78.对学生成绩进行排序

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函数fun的功能是：对N名学生的学习成绩。按从高到低的顺序找出前m（m<=10）名学生来，并将这些学生数据存放在一个动态分配的连续存储区域内，此存储区的首地址作为函数值返回。

#define _CRT_SECURE_NO_WARNINGS#include<stdio.h>#include<alloc.h>#include<string.h>#define N 10typedef struct ss{char num[10];int s;}STU;STU *fun(STU a[], int m){STU b[N], *t;int i, j, k;t = (STU *)calloc(sizeof(STU), m);for (i = 0;i < N;i++)b[i] = a[i];for (k = 0;k < m;k++){for (i = j = 0;i < N;i++)if (b[i].s>b[j].s)j = i;t[k] = b[j];b[j].s = 0;}return t;}outresult(STU a[], FILE *pf){int i;for (i = 0;i < N;i++)fprintf(pf,"No=%s  Mark=%d\n", a[i].num, a[i].s);fprintf(pf, "\n\n");}int main(){STU a[N] = { {"A01",81},{"A02",89},{"A03",66},{"A04",87},{"A05",77},{"A06",90},{"A07",79}, {"A08",61},{"A09",80},{"A10",71} };STU *pOrder;int i, m;printf("****The Original data****\n");outresult(a, stdout);printf("\nGive the number of student who have bettrer score:");scanf("%d", &m);while (m > 10){printf("\nGive the number of the students who have detter score: ");scanf("%d", &m);}pOrder = fun(a, m);printf("****The Result****\n");printf("The top :\n");for (i = 0;i < m;i++)printf("%s   %d\n", pOrder[i].num, pOrder[i].s);free(pOrder);system("pause");return 0;}

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