C-统计个位数

#include <stdio.h>int Count_Digit (const int N,const int D);int main(){    int N, D;     scanf("%d %d",&N, &D);    printf("%d\n",Count_Digit(N,D));getchar();getchar();    return 0;}int Count_Digit(const int N,const int D){int n=N,count=0;    if(n<0)n=-N;while(n!=0){if(n%10==D)count++;n=n/10;}return count;}