poj 2350(\%不可以,%%可以,"%c",'%'也可以)
#include<iostream> #include<cstdio> using namespace std; int main(){ int ans,sum,c,n,data[1005]; double avg,per; scanf("%d",&c); while(c--){ scanf("%d",&n); sum = 0; for(int i=1;i<=n;i++){ scanf("%d",&data[i]); sum += data[i]; } avg = sum*1.0/n; ans = 0; for(int i=1;i<=n;i++) if(data[i]>avg) ans++; per = ans*100.0/n; printf("%.3lf%c\n",per,'%'); } return 0; }