dsfsdf/3.c

#include <stdio.h>
int main()
{
	void manu();
	void log();
	manu();
	log();
	return 0;
}

void manu()
{
	printf("                              1.Input\n");
	printf("                              2.Output\n");
	printf("                              3.Order\n");
	printf("                              4.Quit\n");
	char t=getchar();
	if(t=='i')
	{
		printf("Please input info of the three students:\n");
	}
	else if(t=='o')
	{
		printf("You are trying to Output info\n");
	}
	else if(t=='m')
	{
		printf("You are trying to Make things ordered\n");
	}
	else if(t=='q')
	{
		printf("You are about to Quit\n");
	}
	else
	{
		printf("Wrong input\n");
	}
}

void log()
{
	float sum(float a[][5]);
	void sort(float a[][5]);
	float student[3][5];
	int i,j;
	for(i=0;i<3;i++)
	{
		for(j=0;j<4;j++)
		{
			scanf("%f",&student[i][j]);
		}
	}
	sum(student);
	sort(student);
	for(i=0;i<3;i++)
	{
		printf("%g,%4.1f,%4.1f\n",student[i][0],student[i][4],student[i][4]/3);
	}
}

float sum(float a[][5])
{
	int i;
	for(i=0;i<3;i++)
	{
		a[i][4]=a[i][1]+a[i][2]+a[i][3];
	}
}

void sort(float a[][5])
{
	void swap(float a[][5],int x,int y);
	int i,j,k;
	for(i=0;i<3;i++)
	{
		k=i;
		for(j=i;j<3;j++)
		{
			if(a[i][4]>a[j][4])
			{
				k=j;
			}
		}
		swap(a,i,k);
	}
}

void swap(float a[][5],int x,int y)
{
	int i;
	float temp;
	for(i=0;i<5;i++)
	{
		temp=a[x][i];
		a[x][i]=a[y][i];
		a[y][i]=temp;
	}
}