实验六

#include <stdio.h>

double average(float a,float b,float c) {float d; d=(a+b+c)/3;return d;}

double average2(float a, float b,float c,float d,float e)

{float q; q=(a+b+c+d+e)/5; return q; }

int main() {  int i,j,n;  float a[5][3];  for(i=0;i<5;i++)  

{printf("请输入%d个同学的\n",i+1);  for(j=0;j<3;j++)  

{printf("第%d门学科成绩:",j+1);   scanf("%f",&a[i][j]);}}

 printf("**********************\n");

 printf("*每门学科各自平均成绩*\n");

 for(i=0;i<5;i++){printf("*第%d科学科平均成绩   *\n",i+1);  

 if(average(a[i][0],a[i][1],a[i][2])<10)printf("*%f            *\n",average(a[i][0],a[i][1],a[i][2]));  

else if(average(a[i][0],a[i][1],a[i][2])<100)printf("*%f           *\n",average(a[i][0],a[i][1],a[i][2]));  else printf("*%f          *\n",average(a[i][0],a[i][1],a[i][2]));}    printf("*五名同学各自平均成绩*\n");    

for(i=0;i<3;i++){     printf("*第%d名学生平均成绩   *\n",i+1);     

if(average2(a[0][i],a[1][i],a[2][i],a[3][i],a[4][i])<10)printf("*%f            *\n",average2(a[0][i],a[1][i],a[2][i],a[3][i],a[4][i]));

else if(average2(a[0][i],a[1][i],a[2][i],a[3][i],a[4][i])<100)printf("*%f           *\n",average2(a[0][i],a[1][i],a[2][i],a[3][i],a[4][i]));

else if(average2(a[0][i],a[1][i],a[2][i],a[3][i],a[4][i])<1000)printf("*%f          *\n",average2(a[0][i],a[1][i],a[2][i],a[3][i],a[4][i]));           }   printf("**********************\n");

 return 0; }