已知學生結構體如下：
struct student?
{
?int num;
?char name[8];
?char sex;
?int age;
?float grade;
};
要求按照學生成績進行排序，輸出排序后的結果。

#include<stdio.h>
#include<conio.h>
#include<string.h>
#define?N?10
extern?unsigned?_floatconvert;????/*防止floating?point?formats?not?linked?錯誤發生*/
#pragma?extref?_floatconvert

typedef?struct?student????
{
????int?num;
????char?name[8];
????char?sex;
????int?age;
????float?grade;
}STU;

STU?stu[N]={{101,"Zhang",'M',19,95.6},
????????????{102,"Wang"?,'F',18,92.4},
????????????{103,"Zhao"?,'M',19,85.7},
????????????{104,"Li"???,'M',20,96.3},
????????????{105,"Gao"??,'M',19,96.4},
????????????{106,"Lin"??,'M',18,91.5},
????????????{107,"Ma"???,'F',17,98.7},
????????????{108,"Zhen"?,'M',21,90.1},
????????????{109,"Xu"???,'M',19,89.8},
????????????{110,"Mao"??,'F',18,94.9}};

void?print(STU?*p[])
{
????int?i;
????printf("num\tname\tsex\tage\tgrade\n");
????for(i=0;i<N;i++)
????{
????????printf("%d\t%s\t%c\t%d\t%5.1f\n",p[i]->num,p[i]->name,p[i]->sex,p[i]->age,p[i]->grade);
????}
}

void?gradebub(STU?*p[])
{
????STU?*temp;
????int?i,j,flag;
????for(i=0;i<N-1;i++)
????{
????????flag=0;
????????for(j=0;j<N-i-1;j++)
????????????if(p[j]->grade>p[j+1]->grade)
????????????{
????????????????temp=p[j];p[j]=p[j+1];p[j+1]=temp;
????????????????flag=1;
????????????}
????????if(flag==0)????break;
????}
}

void?main()
{
????int?i;
????STU?*p[N];
????for(i=0;i<N;i++)
????????p[i]=&stu[i];
????print(p);
????printf("\n");
????gradebub(p);
????print(p);
????getch();
}

總結

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