Read and print a 21-digit sequence

Question

I want to enter a sequence of 21 numbers and save it in an array, and after that I want to print the sequence I saved in the array.

This is my code:

void testa_nib () {

    int i=0,c=0;
    int nib[21];
    for (i=0;i<22;i++) {
        c=getchar();
        c=c-'0';
        nib[i] = c;
    }

    for (i=0;i<=21;i++){
        printf ("%d",nib[i]);
    }

int main() {

    testa_nib();
    return 0;
}

This is my input:

123443211234567890127

This is my output:

-38123443211234567890127

Answer 1

One thing to note is that you are trying to assign the value of an integer a char, using the function getchar. Instead, use the scanf. Example

#include <stdio.h>

void testa_nib() {
    int i = 0, c = 0;
    int nib[21];

    for (i = 0; i < 22; i++) {
        scanf("%d", &nib[i]);
    }

    for (i = 0; i <= 21; i++) {
        printf("%d", nib[i]);
    }

}

int main() {
    testa_nib();
    return 0;
}

See working on onlinegdb: https://onlinegdb.com/HJJC02dH4