getline() skipping over string line from text file - c++

Question

My project is supposed to basically sum up the value of all ints on a line and print the word in the next line that amount of times. However, something is causing it to skip over the string line where the word but I am getting the summed value right.
Input file:
1,2,3
word
2,3,4
word2
Here is my code:
int main() {
std::ifstream in;
std::ofstream out;
std::string line;
in.open("input.txt");
out.open("output.txt");
while(std::getline(in, line)){
std::stringstream ss(line);
while(ss){
std::string word;
std::string number;
int a = 0;
while(std::getline(ss, number, ',')){
a = a + atoi(number.c_str());}
std::getline(ss, word);
for (int z = 0; z < a; z++){
out << word << ",";}
out << "\n";
}
}
return(0);
}
Output I'm getting:
,,,,,,
,,,,,,,,,
What I should be getting:
word,word,word,word,word,word
word2,word2,word2,word2,word2,word2,word2,word2

Answer 1

Change:
std::getline(ss, word);
To this:
// Gets the next line in input.txt and stores it in the variable 'word'
std::getline(in, word);
This is because during the while loop, ss is emptied (exhausted) by the nested while loop (the 2nd while loop) and has no words when it's contents are inserted into the variable 'word'.
Final code:
#include <iostream>
#include <fstream>
#include <sstream>
int main() {
std::ifstream in;
std::ofstream out;
std::string line;
in.open("input.txt");
out.open("output.txt");
while (std::getline(in, line)) {
std::stringstream ss(line);
while (ss) {
std::string word;
std::string number;
int a = 0;
while (std::getline(ss, number, ',')) {
a = a + atoi(number.c_str());
}
std::getline(in, word); // Changed line
for (int z = 0; z < a; z++) {
out << word << ",";
}
out << "\n";
}
}
return(0);
}