C primer plus 第七章 练习5： 用swich重做练习3

#include <stdio.h>#include <ctype.h>int main(void){    int c;    int n_ou=0, n_ji=0, n_oushu=0, n_jishu=0;    float n_oup=0, n_jip=0;    printf("请输入一些整数: ");    while((scanf("%d", &c)) == 1)    {         if(c == 0)            break;        switch(c % 2)        {        case 0:            n_ou++;            n_oushu += c;            n_oup = (n_oushu / n_ou);            break;        case 1:            n_ji++;            n_jishu += c;            n_jip = (n_jishu / n_ji);            break;        }    }    printf("有%d个偶数，偶数平均值为%.2f.\n", n_ou, n_oup);    printf("有%d个奇数，奇数平均值为%.2f.\n", n_ji, n_jip);    return 0;}