Question

假定一个学生有三门主课成绩:数学,语文,英语,编写平均值函数求学生的平均成绩

假定一个学生有三门主课成绩:数学,语文,英语,编写平均值函数求学生的平均成绩!
要用函数编写,因为是初学,所以不要编的太难!!

Answer 1

#include"stdio.h"
float average(int a,int b,int c){
return((a+b+c)/3.0);
}
void main(){
int a,b,c;
printf("Please input the scores:");
scanf("%d%d%d",&a,&b,&c);
printf("The average is %f.\n",average(a,b,c));
}

Answer 2

代码很简单,我就不注释了.

#include<stdio.h>
float ave(float a,float b,float c);
void indat(float &a,float &b,float &c);
void outprint(float a,float b,float c);
void main()
{
float Chn,Math,Eng;
indat(Chn,Math,Eng);
outprint(Chn,Math,Eng);
}

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

void indat(float a,float b,float c)
{
printf("please input Chinese grade:");
scanf("%f",&a);
printf("please input Math grade:");
scanf("%f",&b);
printf("please input English grade:");
scanf("%f",&c);
}
void outprint(float a,float b,float c)
{
printf("grade:\t Chinese\t math\t English\t average\n");
printf("\t %8.2f %8.2f %8.2f %8.2f",a,b,c,ave(a,b,c));
}

Answer 3

float average(int a,int b,int c){
float aver;
aver=(a+b+c)/3.0;
return(aver);
}