c primer plus 第七章 3

3．编写一个程序。该程序读取整数，直到输入0。输入终止后，程序应该报告输入的偶数（不包括0）总个数、偶数的平均值，输入的奇数总个数以及奇数的平均值。

用不着用数组，直接设成整数就可以了

#include<stdio.h>int main(void){ int i_even = 0, sum_even = 0, i_odd = 0, sum_odd = 0, num; printf("Please input numbers (0 to quit):"); while(1) {  scanf("%d",&num);  if (num == 0) break;  if (num % 2 == 0) {i_even++; sum_even += num;}  else {i_odd++; sum_odd += num;} } printf("even number's count:%d\n",i_even); printf("even number's average:%d\n",sum_even / i_even); printf("odd  number's count:%d\n",i_odd); printf("odd  number's average:%d\n",sum_odd / i_odd); return(0);}