string - C++ Question mark output -

i have simple program converts decimal numbers binary numbers. no errors come when run program single question mark. should set of values "00101" trying use function returns string well. here code,

#include <iostream> using namespace std; #include <string>  string convert(int num) {     string binary;     int remainder; } 

any ideas? help

there several problems code. first, assigning string binary using = sign on line binary = remainder. meant write binary += remainder, append remainder string.

the second problem on line. both string::operator= , string::operator+= have overloads take char. overloads called, when pass in int. string being set character ascii value 0 or 1, question mark character, not looking for. can use std::to_string convert int string. or if need level of control on formatting, can use std::ostringstream in this answer.

in other words, change binary = remainder; binary += std::to_string(remainder).

third problem: there return statement inside while loop. function return after 1 iteration of loop, no matter how large num is. remove return statement, there 1 @ end of convert function.