第三章第42题

P124

#include<stdio.h>double Count(double a[],int n){int i,c=0;double b,s=0;for(i=0;i<n;i++)s=s+a[i];b=s/n;return b;}int main(){char ch;int j,N,c=0;double t=0;double a[100];do{printf("input N:");scanf("%d",&N);printf("input your number:\n");for(j=0;j<N;j++)scanf("%lf",&a[j]);printf("平均数为:%lf\n",Count(a,N));t=Count(a,N);for(j=0;j<N;j++){if(a[j]>=t)c=c+1;}printf("大于等于平均数的个数%d\n",c);printf("是否继续？[y/n][y]");  while((ch=getchar())!='\n');  }while((ch=getchar())=='y'||ch=='\n');  return 0;  }