C++ program that processes unique markup language similar to HTML
2
I have solved a task which takes input in a unique markup language. In this language each element consists of a starting and closing tag. Only starting tags can have attributes. Each attribute has a corresponding name and value.
For example:
<tag-name attribute1-name = "Value" attribute2-name = "Value2" ... >
A closing tag follows this format:
</tag-name>
The tags may also be nested. For example:
<tag1 value = "HelloWorld">
<tag2 name = "Name1">
</tag2>
</tag1>
Attributes are referenced as:
tag1~value
tag1.tag2~name
The source code of the markup language is given in n lines of input, the number of attribute references or queries is q.
I am seeking any improvements to my code and any bad practices I may be using.
#include <vector>
#include <iostream>
using namespace std;
typedef vector < string > VS;
typedef vector < VS > VVS;
//Takes numberOfLines of input and splits the lines into strings
VS Split(int numberOfLines) {
VS myVec;
string x;
for (int i = 0; i < numberOfLines; i++) {
getline(cin, x);
string::size_type start = 0;
string::size_type end = 0;
while ((end = x.find(" ", start)) != string::npos) {
myVec.push_back(x.substr(start, end - start));
start = end + 1;
}
myVec.push_back(x.substr(start));
}
return myVec;
}
//removes unnecessary characters in this case they are: " ,
// > (if it is the final element of the tag), and "
string Remove(string s) {
string c = s;
c.erase(c.begin());
auto x = c.end() - 1;
if ( * x == '>') {
c.erase(x);
x = c.end() - 1;
}
c.erase(x);
return c;
}
int main() {
VS HRML, attributes, values, t, validTags;
VVS Tags, ValidAttributes, ValidValues;
int n, q;
cin >> n >> q;
HRML = Split(n);
//does the heavy lifting
for (int i = 0; i < HRML.size(); i++) {
string x = HRML[i];
//checks if x contains the beginning of the starting tag
if (x[0] == '<' && x[1] != '/') {
//checks if x contains the end of the starting tag
if (x[x.size() - 1] == '>' && x[1] != '/') {
ValidAttributes.push_back(attributes);
attributes.clear();
ValidValues.push_back(values);
values.clear();
}
auto c = x.end() - 1;
if ( * c == '>') {
x.erase(c);
}
x.erase(x.begin());
t.push_back(x);
Tags.push_back(t);
}
// checks if x contains the end of the starting tag
if (x[x.size() - 1] == '>' && x[1] != '/') {
ValidAttributes.push_back(attributes);
attributes.clear();
ValidValues.push_back(values);
values.clear();
}
//checks if x contains the ending tag
else if (x[1] == '/') {
x.erase(x.begin());
x.erase(x.begin());
x.erase(x.end() - 1);
for (int i = 0; i < t.size(); i++) {
if (x == t[i]) {
t.erase(t.begin() + i);
}
}
}
//checks to see if an attribute has been assigned a value
else if (x == "=") {
attributes.push_back(HRML[i - 1]);
values.push_back(Remove(HRML[i + 1]));
}
}
string x = "";
//makes valid(user-usable) tags from all the tags
// passed into vector<string> Tags
for (int i = 0; i < Tags.size(); i++) {
for (int j = 0; j < Tags[i].size(); j++) {
if (Tags[i].size() > 1) {
string begin = Tags[i][j] + '.';
x += begin;
if (j == (Tags[i].size() - 1)) {
x.erase(x.end() - 1);
validTags.push_back(x + '~');
x = "";
}
} else {
validTags.push_back(Tags[i][0] + '~');
}
}
}
//iterates through each query given by the user and checks if it is valid
for (int i = 0; i < q + 1; i++) {
string output = "";
if (i == 0) {
string x;
getline(cin, x);
} else {
string x;
getline(cin, x);
int c = 0;
for (int j = 0; j < validTags.size(); j++) {
for (int p = 0; p < ValidAttributes[c].size(); p++) {
if (x == validTags[j] + ValidAttributes[c][p]) {
output = ValidValues[c][p];
/*if a valid attribute reference has been
found then there is no need to check the rest
of validAttribute[c] */
goto endOfLoop;
} else {
output = "Not Found!";
}
}
if (c < (ValidAttributes.size() - 1)) {
c++;
}
}
endOfLoop:
cout << output << endl;
}
}
return 0;
}
c++ parsing reinventing-the-wheel
asked yesterday
UzemljenjeUzemljenje
112
New contributor
Uzemljenje is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
2
I have solved a task which takes input in a unique markup language. In this language each element consists of a starting and closing tag. Only starting tags can have attributes. Each attribute has a corresponding name and value.
For example:
<tag-name attribute1-name = "Value" attribute2-name = "Value2" ... >
A closing tag follows this format:
</tag-name>
The tags may also be nested. For example:
<tag1 value = "HelloWorld">
<tag2 name = "Name1">
</tag2>
</tag1>
Attributes are referenced as:
tag1~value
tag1.tag2~name
The source code of the markup language is given in n lines of input, the number of attribute references or queries is q.
I am seeking any improvements to my code and any bad practices I may be using.
#include <vector>
#include <iostream>
using namespace std;
typedef vector < string > VS;
typedef vector < VS > VVS;
//Takes numberOfLines of input and splits the lines into strings
VS Split(int numberOfLines) {
VS myVec;
string x;
for (int i = 0; i < numberOfLines; i++) {
getline(cin, x);
string::size_type start = 0;
string::size_type end = 0;
while ((end = x.find(" ", start)) != string::npos) {
myVec.push_back(x.substr(start, end - start));
start = end + 1;
}
myVec.push_back(x.substr(start));
}
return myVec;
}
//removes unnecessary characters in this case they are: " ,
// > (if it is the final element of the tag), and "
string Remove(string s) {
string c = s;
c.erase(c.begin());
auto x = c.end() - 1;
if ( * x == '>') {
c.erase(x);
x = c.end() - 1;
}
c.erase(x);
return c;
}
int main() {
VS HRML, attributes, values, t, validTags;
VVS Tags, ValidAttributes, ValidValues;
int n, q;
cin >> n >> q;
HRML = Split(n);
//does the heavy lifting
for (int i = 0; i < HRML.size(); i++) {
string x = HRML[i];
//checks if x contains the beginning of the starting tag
if (x[0] == '<' && x[1] != '/') {
//checks if x contains the end of the starting tag
if (x[x.size() - 1] == '>' && x[1] != '/') {
ValidAttributes.push_back(attributes);
attributes.clear();
ValidValues.push_back(values);
values.clear();
}
auto c = x.end() - 1;
if ( * c == '>') {
x.erase(c);
}
x.erase(x.begin());
t.push_back(x);
Tags.push_back(t);
}
// checks if x contains the end of the starting tag
if (x[x.size() - 1] == '>' && x[1] != '/') {
ValidAttributes.push_back(attributes);
attributes.clear();
ValidValues.push_back(values);
values.clear();
}
//checks if x contains the ending tag
else if (x[1] == '/') {
x.erase(x.begin());
x.erase(x.begin());
x.erase(x.end() - 1);
for (int i = 0; i < t.size(); i++) {
if (x == t[i]) {
t.erase(t.begin() + i);
}
}
}
//checks to see if an attribute has been assigned a value
else if (x == "=") {
attributes.push_back(HRML[i - 1]);
values.push_back(Remove(HRML[i + 1]));
}
}
string x = "";
//makes valid(user-usable) tags from all the tags
// passed into vector<string> Tags
for (int i = 0; i < Tags.size(); i++) {
for (int j = 0; j < Tags[i].size(); j++) {
if (Tags[i].size() > 1) {
string begin = Tags[i][j] + '.';
x += begin;
if (j == (Tags[i].size() - 1)) {
x.erase(x.end() - 1);
validTags.push_back(x + '~');
x = "";
}
} else {
validTags.push_back(Tags[i][0] + '~');
}
}
}
//iterates through each query given by the user and checks if it is valid
for (int i = 0; i < q + 1; i++) {
string output = "";
if (i == 0) {
string x;
getline(cin, x);
} else {
string x;
getline(cin, x);
int c = 0;
for (int j = 0; j < validTags.size(); j++) {
for (int p = 0; p < ValidAttributes[c].size(); p++) {
if (x == validTags[j] + ValidAttributes[c][p]) {
output = ValidValues[c][p];
/*if a valid attribute reference has been
found then there is no need to check the rest
of validAttribute[c] */
goto endOfLoop;
} else {
output = "Not Found!";
}
}
if (c < (ValidAttributes.size() - 1)) {
c++;
}
}
endOfLoop:
cout << output << endl;
}
}
return 0;
}
c++ parsing reinventing-the-wheel
asked yesterday
UzemljenjeUzemljenje
112
New contributor
Uzemljenje is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
You could use Yacc to generate the parser, rather than use custom error-prone parsing.
– esote
yesterday
3
This was just a task I decided to do for fun.
– Uzemljenje
yesterday
You have agotoin your code. Most coding standards consider this bad just by itself. I would consider it bad only if you can't justify it. But there is no comment explaining why you need a goto.
– Martin York
6 hours ago
Your indentation is horrible and makes the code nearly unreadable. I'll come back and review it if you fix the indentation. But otherwise I'll just ignore.
– Martin York
6 hours ago
@MartinYork I have re-formatted the code. If it is sill unreadable, please let me know.
– Uzemljenje
4 hours ago
add a comment |
2
2
2
I have solved a task which takes input in a unique markup language. In this language each element consists of a starting and closing tag. Only starting tags can have attributes. Each attribute has a corresponding name and value.
For example:
<tag-name attribute1-name = "Value" attribute2-name = "Value2" ... >
A closing tag follows this format:
</tag-name>
The tags may also be nested. For example:
<tag1 value = "HelloWorld">
<tag2 name = "Name1">
</tag2>
</tag1>
Attributes are referenced as:
tag1~value
tag1.tag2~name
The source code of the markup language is given in n lines of input, the number of attribute references or queries is q.
I am seeking any improvements to my code and any bad practices I may be using.
#include <vector>
#include <iostream>
using namespace std;
typedef vector < string > VS;
typedef vector < VS > VVS;
//Takes numberOfLines of input and splits the lines into strings
VS Split(int numberOfLines) {
VS myVec;
string x;
for (int i = 0; i < numberOfLines; i++) {
getline(cin, x);
string::size_type start = 0;
string::size_type end = 0;
while ((end = x.find(" ", start)) != string::npos) {
myVec.push_back(x.substr(start, end - start));
start = end + 1;
}
myVec.push_back(x.substr(start));
}
return myVec;
}
//removes unnecessary characters in this case they are: " ,
// > (if it is the final element of the tag), and "
string Remove(string s) {
string c = s;
c.erase(c.begin());
auto x = c.end() - 1;
if ( * x == '>') {
c.erase(x);
x = c.end() - 1;
}
c.erase(x);
return c;
}
int main() {
VS HRML, attributes, values, t, validTags;
VVS Tags, ValidAttributes, ValidValues;
int n, q;
cin >> n >> q;
HRML = Split(n);
//does the heavy lifting
for (int i = 0; i < HRML.size(); i++) {
string x = HRML[i];
//checks if x contains the beginning of the starting tag
if (x[0] == '<' && x[1] != '/') {
//checks if x contains the end of the starting tag
if (x[x.size() - 1] == '>' && x[1] != '/') {
ValidAttributes.push_back(attributes);
attributes.clear();
ValidValues.push_back(values);
values.clear();
}
auto c = x.end() - 1;
if ( * c == '>') {
x.erase(c);
}
x.erase(x.begin());
t.push_back(x);
Tags.push_back(t);
}
// checks if x contains the end of the starting tag
if (x[x.size() - 1] == '>' && x[1] != '/') {
ValidAttributes.push_back(attributes);
attributes.clear();
ValidValues.push_back(values);
values.clear();
}
//checks if x contains the ending tag
else if (x[1] == '/') {
x.erase(x.begin());
x.erase(x.begin());
x.erase(x.end() - 1);
for (int i = 0; i < t.size(); i++) {
if (x == t[i]) {
t.erase(t.begin() + i);
}
}
}
//checks to see if an attribute has been assigned a value
else if (x == "=") {
attributes.push_back(HRML[i - 1]);
values.push_back(Remove(HRML[i + 1]));
}
}
string x = "";
//makes valid(user-usable) tags from all the tags
// passed into vector<string> Tags
for (int i = 0; i < Tags.size(); i++) {
for (int j = 0; j < Tags[i].size(); j++) {
if (Tags[i].size() > 1) {
string begin = Tags[i][j] + '.';
x += begin;
if (j == (Tags[i].size() - 1)) {
x.erase(x.end() - 1);
validTags.push_back(x + '~');
x = "";
}
} else {
validTags.push_back(Tags[i][0] + '~');
}
}
}
//iterates through each query given by the user and checks if it is valid
for (int i = 0; i < q + 1; i++) {
string output = "";
if (i == 0) {
string x;
getline(cin, x);
} else {
string x;
getline(cin, x);
int c = 0;
for (int j = 0; j < validTags.size(); j++) {
for (int p = 0; p < ValidAttributes[c].size(); p++) {
if (x == validTags[j] + ValidAttributes[c][p]) {
output = ValidValues[c][p];
/*if a valid attribute reference has been
found then there is no need to check the rest
of validAttribute[c] */
goto endOfLoop;
} else {
output = "Not Found!";
}
}
if (c < (ValidAttributes.size() - 1)) {
c++;
}
}
endOfLoop:
cout << output << endl;
}
}
return 0;
}
c++ parsing reinventing-the-wheel
asked yesterday
UzemljenjeUzemljenje
112
New contributor
Uzemljenje is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have solved a task which takes input in a unique markup language. In this language each element consists of a starting and closing tag. Only starting tags can have attributes. Each attribute has a corresponding name and value.
For example:
<tag-name attribute1-name = "Value" attribute2-name = "Value2" ... >
A closing tag follows this format:
</tag-name>
The tags may also be nested. For example:
<tag1 value = "HelloWorld">
<tag2 name = "Name1">
</tag2>
</tag1>
Attributes are referenced as:
tag1~value
tag1.tag2~name
The source code of the markup language is given in n lines of input, the number of attribute references or queries is q.
I am seeking any improvements to my code and any bad practices I may be using.
#include <vector>
#include <iostream>
using namespace std;
typedef vector < string > VS;
typedef vector < VS > VVS;
//Takes numberOfLines of input and splits the lines into strings
VS Split(int numberOfLines) {
VS myVec;
string x;
for (int i = 0; i < numberOfLines; i++) {
getline(cin, x);
string::size_type start = 0;
string::size_type end = 0;
while ((end = x.find(" ", start)) != string::npos) {
myVec.push_back(x.substr(start, end - start));
start = end + 1;
}
myVec.push_back(x.substr(start));
}
return myVec;
}
//removes unnecessary characters in this case they are: " ,
// > (if it is the final element of the tag), and "
string Remove(string s) {
string c = s;
c.erase(c.begin());
auto x = c.end() - 1;
if ( * x == '>') {
c.erase(x);
x = c.end() - 1;
}
c.erase(x);
return c;
}
int main() {
VS HRML, attributes, values, t, validTags;
VVS Tags, ValidAttributes, ValidValues;
int n, q;
cin >> n >> q;
HRML = Split(n);
//does the heavy lifting
for (int i = 0; i < HRML.size(); i++) {
string x = HRML[i];
//checks if x contains the beginning of the starting tag
if (x[0] == '<' && x[1] != '/') {
//checks if x contains the end of the starting tag
if (x[x.size() - 1] == '>' && x[1] != '/') {
ValidAttributes.push_back(attributes);
attributes.clear();
ValidValues.push_back(values);
values.clear();
}
auto c = x.end() - 1;
if ( * c == '>') {
x.erase(c);
}
x.erase(x.begin());
t.push_back(x);
Tags.push_back(t);
}
// checks if x contains the end of the starting tag
if (x[x.size() - 1] == '>' && x[1] != '/') {
ValidAttributes.push_back(attributes);
attributes.clear();
ValidValues.push_back(values);
values.clear();
}
//checks if x contains the ending tag
else if (x[1] == '/') {
x.erase(x.begin());
x.erase(x.begin());
x.erase(x.end() - 1);
for (int i = 0; i < t.size(); i++) {
if (x == t[i]) {
t.erase(t.begin() + i);
}
}
}
//checks to see if an attribute has been assigned a value
else if (x == "=") {
attributes.push_back(HRML[i - 1]);
values.push_back(Remove(HRML[i + 1]));
}
}
string x = "";
//makes valid(user-usable) tags from all the tags
// passed into vector<string> Tags
for (int i = 0; i < Tags.size(); i++) {
for (int j = 0; j < Tags[i].size(); j++) {
if (Tags[i].size() > 1) {
string begin = Tags[i][j] + '.';
x += begin;
if (j == (Tags[i].size() - 1)) {
x.erase(x.end() - 1);
validTags.push_back(x + '~');
x = "";
}
} else {
validTags.push_back(Tags[i][0] + '~');
}
}
}
//iterates through each query given by the user and checks if it is valid
for (int i = 0; i < q + 1; i++) {
string output = "";
if (i == 0) {
string x;
getline(cin, x);
} else {
string x;
getline(cin, x);
int c = 0;
for (int j = 0; j < validTags.size(); j++) {
for (int p = 0; p < ValidAttributes[c].size(); p++) {
if (x == validTags[j] + ValidAttributes[c][p]) {
output = ValidValues[c][p];
/*if a valid attribute reference has been
found then there is no need to check the rest
of validAttribute[c] */
goto endOfLoop;
} else {
output = "Not Found!";
}
}
if (c < (ValidAttributes.size() - 1)) {
c++;
}
}
endOfLoop:
cout << output << endl;
}
}
return 0;
}
c++ parsing reinventing-the-wheel
c++ parsing reinventing-the-wheel
asked yesterday
UzemljenjeUzemljenje
112
New contributor
Uzemljenje is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
UzemljenjeUzemljenje
112
New contributor
Uzemljenje is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 5 hours ago
Uzemljenje
asked yesterday
UzemljenjeUzemljenje
112
New contributor
Uzemljenje is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
UzemljenjeUzemljenje
112
asked yesterday
UzemljenjeUzemljenje
112
112
New contributor
Uzemljenje is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Uzemljenje is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Uzemljenje is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
You could use Yacc to generate the parser, rather than use custom error-prone parsing.
– esote
yesterday
3
This was just a task I decided to do for fun.
– Uzemljenje
yesterday
You have agotoin your code. Most coding standards consider this bad just by itself. I would consider it bad only if you can't justify it. But there is no comment explaining why you need a goto.
– Martin York
6 hours ago
Your indentation is horrible and makes the code nearly unreadable. I'll come back and review it if you fix the indentation. But otherwise I'll just ignore.
– Martin York
6 hours ago
@MartinYork I have re-formatted the code. If it is sill unreadable, please let me know.
– Uzemljenje
4 hours ago
add a comment |
You could use Yacc to generate the parser, rather than use custom error-prone parsing.
– esote
yesterday
3
This was just a task I decided to do for fun.
– Uzemljenje
yesterday
You have agotoin your code. Most coding standards consider this bad just by itself. I would consider it bad only if you can't justify it. But there is no comment explaining why you need a goto.
– Martin York
6 hours ago
Your indentation is horrible and makes the code nearly unreadable. I'll come back and review it if you fix the indentation. But otherwise I'll just ignore.
– Martin York
6 hours ago
@MartinYork I have re-formatted the code. If it is sill unreadable, please let me know.
– Uzemljenje
4 hours ago
You could use Yacc to generate the parser, rather than use custom error-prone parsing.
– esote
yesterday
You could use Yacc to generate the parser, rather than use custom error-prone parsing.
– esote
yesterday
3
3
This was just a task I decided to do for fun.
– Uzemljenje
yesterday
This was just a task I decided to do for fun.
– Uzemljenje
yesterday
You have a
goto in your code. Most coding standards consider this bad just by itself. I would consider it bad only if you can't justify it. But there is no comment explaining why you need a goto.– Martin York
6 hours ago
You have a
goto in your code. Most coding standards consider this bad just by itself. I would consider it bad only if you can't justify it. But there is no comment explaining why you need a goto.– Martin York
6 hours ago
Your indentation is horrible and makes the code nearly unreadable. I'll come back and review it if you fix the indentation. But otherwise I'll just ignore.
– Martin York
6 hours ago
Your indentation is horrible and makes the code nearly unreadable. I'll come back and review it if you fix the indentation. But otherwise I'll just ignore.
– Martin York
6 hours ago
@MartinYork I have re-formatted the code. If it is sill unreadable, please let me know.
– Uzemljenje
4 hours ago
@MartinYork I have re-formatted the code. If it is sill unreadable, please let me know.
– Uzemljenje
4 hours ago
add a comment |
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You could use Yacc to generate the parser, rather than use custom error-prone parsing.
– esote
yesterday
3
This was just a task I decided to do for fun.
– Uzemljenje
yesterday
You have a
gotoin your code. Most coding standards consider this bad just by itself. I would consider it bad only if you can't justify it. But there is no comment explaining why you need a goto.– Martin York
6 hours ago
Your indentation is horrible and makes the code nearly unreadable. I'll come back and review it if you fix the indentation. But otherwise I'll just ignore.
– Martin York
6 hours ago
@MartinYork I have re-formatted the code. If it is sill unreadable, please let me know.
– Uzemljenje
4 hours ago