假设有五位同学四门课程（高数、英语、C语言和历史）的成绩，编一程序计算每一位同学的总分，平均分及每门功课的平均分。

#include <stdio.h>
int main()
{
	float x[5][4] = { {100,95,99,90},{99,99,99,99},{89,89,96,79},{65,98,100,100},{87,89,98,100} };
	int i, j, k, m, n, z;
	float a, b, c, d;
	for (i = 0, k = 1; i < 5, k < 6; i++, k++)
	{
		a = 0;
		for (j = 0; j < 4; j++)
		{
			a = a + x[i][j];
		}
		b = a / 4;
		printf("第%d位同学总分为%f,平均分为%f\n", k, a, b);
	}
	for (m = 0, z = 1; m < 4, z < 5; m++, z++)
	{
		c = 0;
		for (n = 0; n < 5; n++)
		{
			c = c + x[n][m];
		}
		d = c / 5;
		printf("第%d门课的平均分是%f\n", z, d);
	}
	return 0;
}