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#include?

#include?"stdlib.h"

int?i,j;

struct?STUDENT

{

int?xuehao;

float?yuwen;

float?shuxue;

float?yingyu;

float?sum;

float?average;

}student[3];

void?huhuan1(int?a,int?b)

{int?c;?c=a;a=b;b=c;}

void?huhuan(float?x,float?y)

{float?z;?z=x;x=y;y=z;}

int?main()

{

for(i=0;i<3;i++)

{

printf("input?%d:\n?",i+1);

printf("xuehao:");

scanf("%d",student[i].xuehao);

printf("yuwen:");

scanf("%f",student[i].yuwen);

printf("shuxue:");

scanf("%f",student[i].shuxue);

printf("yingyu:");

scanf("%f",student[i].yingyu);

student[i].sum=student[i].yuwen+student[i].shuxue+student[i].yingyu;

student[i].average=student[i].sum/3;

printf("sum=%f\n",student[i].sum);

printf("average=%f\n",student[i].average);

}

for(i=0;i<3;i++)

for(j=i+1;j<3;j++)

if(student[j].sum>student[i].sum)

{?huhuan1(?student[i].xuehao,student[j].xuehao);

huhuan(student[i].yuwen,student[j].yuwen);

huhuan(student[i].shuxue,student[j].shuxue);

huhuan(student[i].yingyu,student[j].yingyu);

huhuan(student[i].sum,student[j].sum);

huhuan(student[i].average,student[j].average);}

for(i=0;i<3;i++)

{printf("%d?%f?%f?%f%f?%f\n",student[i].xuehao,student[i].yuwen,

student[i].shuxue,student[i].yingyu,student[i].sum,student[i].average);}

getch();return?0;

}

總結

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