C语言程序设计（第4版）何颜钦 课后习题随笔

#include 
int countdigit(int number, int digit);

int main(void)
{
    int number, digit;
    printf("Please enter number and digit.n");

    scanf("%d %d", &number ,&digit);

    printf("zs=%dn", countdigit(number,digit));
}

int countdigit(int number, int digit)

{

    int z;
    do
    {
        if (number % 10 == digit)
        {
            z++;
            number = number / 10;
        }
        else if (number % 10 != digit)
        {
            number = number / 10;
        }

    } while (number >0);

    return z;
}

P121 L5使用函数统计指定数字个数....