Question

How to convert a specific row of a matrix to a string in C++

Answer 1

#include <iostream>
#include <sstream>
#include <string>
  
#define COLS 6
  
std::string convert_row_to_string(int matrix[][COLS], int row, int cols) {
    std::string str = "";
    std::ostringstream oss;
   
    for (int j = 0; j < cols; j++) {
        oss <<  matrix[row][j];
        str += oss.str() + " ";
        oss.str("");
        oss.clear();
    }
      
    return str;
}
  
int main() {
    int matrix[][COLS] = { 
            { 4, 7, 9, 18, 29, 0 },
            { 1, 9, 18, 99, 4, 3 },
            { 9, 17, 89, 2, 7, 5 },
            { 19, 49, 6, 1, 9, 8 },
            { 29, 4, 7, 9, 18, 6 } };
  
    int row = 2;
  
    std::string str = convert_row_to_string(matrix, row, COLS);
      
    std::cout << str;
}
  
  
  
/*
run:
  
9 17 89 2 7 5 
  
*/

 

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