Convert Integer to String

Code

#include <stdio.h>

void print_integer_as_string(int num) {
    if(num == 0) {
        putchar('0');
        return;
    }

    if(num<0) {
        putchar('-');
        putchar(' ');
        num = -num;
    }

    char digit[20];
    int i = 0;

    while(num>0) {
        int rem = num % 10;
        digit[i++] = '0' + rem;
        num /= 10;
    }

    for(int j = i-1; j>=0; j--) {
        putchar(digit[j]);
        if(j != 0) putchar(' ');
    }
}

int main() {
    int num;
    scanf("%d", &num);
    print_integer_as_string(num);
    return 0;
}

Solving Approach