Question

How to check if specific digit exists in a number with C++

Answer 1

#include <iostream>

bool check_digit_exists(int n, int digit) {
    while (n > 0) {
        if (digit == n % 10) {
            return true;
        }
        n = n / 10;
    }
    return false;
}
  
int main(void)
{
    int num = 230138;
     
    std::cout << check_digit_exists(num, 8) << "\n";
     
    std::cout << check_digit_exists(num, 5);
}
  
    
    
    
/*
run:
    
1
0
 
*/

 

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