Question

How to check if a number has zero in the center in C

Answer 1

#include <stdio.h>
#include <string.h>

int hasZeroInCenter(int num) {
    char str[20];
    sprintf(str, "%d", num); // Convert number to string

    int len = strlen(str);
    if (len % 2 == 0) {
        return 0; // Even length = no center digit
    }

    int centerIndex = len / 2;
    
    return str[centerIndex] == '0';
}

int main() {
    int num = 3720961;
    if (hasZeroInCenter(num)) {
        printf("yes\n");
    } else {
        printf("no\n");
    }

    return 0;
}



/*
run:

yes

*/

 

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