above average(0706)

原题目地址
above average(0706)
Time limit(ms): 1000Memory limit(kb): 65535Submission: 1400Accepted: 882Accepted
It is said that 90% of frosh expect to be above average in their class. You are to provide a reality check. Description
The first line of standard input contains an integer C, the number of test cases. C data sets follow. Each data set begins with an integer, N, the number of people in the class (1 <= N <= 1000). N integers follow, separated by spaces or newlines, each giving the final grade (an integer 0 <= final grade <= 100) of a student.
Input
For each case you are to output a line giving the percentage of students whose grade is above average, rounded to 3 decimal places. Output

5 50 50 70 80 100
7 100 95 90 80 70 60 50
3 70 90 80
3 70 90 81
9 100 99 98 97 96 95 94 93 91
Sample Input
40.000%
57.143%
33.333%
66.667%
55.556%

题目大意：给出n个学生成绩求高于平均成绩的百分比

#include <stdio.h>int main(){    double a[105];    int test,n,num;    double avg;    int i;    scanf("%d",&test);    while(test--)    {        scanf("%d",&n);        avg=0;        num=0;        for(i=0;i<n;i++)         {            scanf("%lf",&a[i]);            avg+=a[i];        }        avg=avg/n;        for(i=0;i<n;i++)        {            if(a[i]>avg) num++;        }        printf("%.3lf%%\n",(double)num/n*100);    }    return 0;}