Digit Frequency

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

int main() {

    char s;
    int i,a[] ={0,0,0,0,0,0,0,0,0,0};
    while(scanf("%c", &s) == 1)
        if(s >= '0' && s <= '9')
            a[s-'0']+=1;
                        
    for(i=0;i<10;i++)
        printf("%d ",a[i]);  
    return 0;

}