Question

How to check if a number contain zero in C++

Answer 1

#include <iostream>
#include <string>

// Function to check if a number contains the digit 0
bool containsZero(int num) {
    std::string str = std::to_string(num);
    
    return str.find('0') != std::string::npos;
}

int main() {
    int num = 97105;
    
    if (containsZero(num)) {
        std::cout << "The number contains 0.\n";
    } else {
        std::cout << "The number does not contain 0.\n";
    }
}
 
   
    
/* 
run:
    
The number contains 0.
    
*/

 

70+ SQL courses for beginners and professionals

Answer 2

#include <iostream>

// Function to check if a number contains the digit 0
bool containsZero(int num) {
    if (num == 0) return true; // Special case for 0
    
    while (num > 0) {
        if (num % 10 == 0) {
            return true;
        }
        num /= 10;
    }
    return false;
}

int main() {
    int num = 97105;
    if (containsZero(num)) {
        std::cout << "The number contains 0.\n";
    } else {
        std::cout << "The number does not contain 0.\n";
    }
}

   
    
/* 
run:
    
The number contains 0.
    
*/

 

70+ SQL courses for beginners and professionals