using the ASCII value concept

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

int main() {

    char* arr;
    arr = (char*)malloc(sizeof(char)*1001);
    int total = 0;
    scanf("%s",arr);
    arr = (char*)realloc(arr,sizeof(char)*(strlen(arr)+1));
    int* countno;
    countno = (int*)calloc(sizeof(int),10);
    for(int i = 0;i < strlen(arr);i++){
        ((int)arr[i] >47 && (int)arr[i] <58)?countno[(int)arr[i] - 48] += 1 :(countno[0] = countno[0]); 
    }   
    free(arr);
    arr = NULL;
    
    for(int i =0; i<10;i++){
        printf("%d ",countno[i]);
    }
    
    free(countno);
    countno = NULL;
    
    return 0;
}