Question

Counting The Number of Zero In Input (C++)

1. User can input a simple integer. For example: 309020.

2. Expected output should be: 3.

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1. User can input a very long integer. For example: 6505600560501015606400056140065510145610651065169156505561065100560056

2. Expected output should be: 21.

Thanks in advance.

Answer 1

#include <iostream>
#include <string>
using namespace std;

int main() {
    string s;
    //cout << "Enter a number: "; // uncomment This line if you want a prompt
    cin >> s;
    int count = 0;
    for (int i = 0; i < s.size(); ++i) {
        if (s[i] == '0') {
            ++count;
        }
    }
    cout << count << endl;
    return 0;
}