Code

#include <stdio.h>

void print_integer_as_string(int num) {
    char buffer[12];
    int i=0;
    int neg=0;
    if(num == 0){
        printf("0");
        return;
    }
    if(num < 0){
        num = -num;
        neg=1;
    }

    while(num > 0){
        buffer[i++]=(num % 10) + '0';
        num /= 10;
    }
    if(neg){
        buffer[i++]='-';
    }
    for(int j=i-1;j>=0;j--){
        printf("%c",buffer[j]);
        if(j > 0){
            printf(" ");
        }
    }
}

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

Solving Approach

 

 

 

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Input

123

Expected Output

1 2 3