怎么用c语言来做这个问题?

/**已知某位学生的数学、英语和计算机课程的成绩分别是87分、72分和93分,求该生3门课程的平均成绩。

输入格式:

本题无输入

输出格式:

按照下列格式输出结果:
math = 87, eng = 72, comp = 93, average = 计算所得的平均成绩
**/

#include
void main()
{
int math=87;
int english=72;
int computer=93;
float average=0;
int sum=math+english+computer;
average=sum/3;
printf("math=%d,eng=%d,comp=%d,average=%f\n",math,english,computer,average);
}

#include

void main()
{
int math = 87, eng = 72, comp = 93;
int average;
printf("average = %d\n",(math+eng+comp)/3);
}
大学新生?还是高中生?
自己好好学!

#include
int main()
{
int math = 87, eng = 72, comp = 93;
float average;
average=(math+eng+comp)/3;
printf("math=%d,eng=%d,comp=%d,average=%.2f\n",math,eng,comp,average);
}

#include
int main()
{
int math = 87, eng = 72, comp = 93;
float average;
average=(math+eng+comp)/3;
printf("math=%d,eng=%d,comp=%d,average=%.2f\n",math,eng,comp,average);
}

#include
void main()
{
int math = 87, eng = 72, comp = 93;
float average;
average=(math+eng+comp)/3;
printf("math=%d,eng=%d,average = %d\n",math ,eng,average);
}
楼主好好学习