10370 - Above Average
2013-02-22 20:26
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Problem D: Above Average
It is said that 90% of frosh expect to be above average in their class. You are to provide a reality check.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 between 0 and 100) of a student in the class. For each case you are to output a line giving the percentage of students whose grade is above average, rounded to 3 decimal places.
Sample Input
5 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
Output for Sample Input
40.000% 57.143% 33.333% 66.667% 55.556%
#include"stdio.h" int main() { double c,n,s[1000],g,m,a,t;//其中c代表有多少组数据,n代表数据多少个数;s[1000]保存数据;g代表超过平均个数;a代表平均数; int i; scanf("%lf",&c); while(c--) { scanf("%lf",&n); m=0; g=0; for(i=0;i<n;i++) {scanf("%lf",&s[i]); m+=s[i];} a=m/n; for(i=0;i<n;i++) if(s[i]>a) g++; t=g/n*100; printf("%0.3lf",t); printf("%%\n");//输出%; } return 0; }
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