金字招牌

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/* 分模块设计一个学生信息库系统。该系统包含学生基本信息的建立和输出
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、计算学生平均成绩、按照学生的平均成绩排序以及查询、修改学生的成绩等功能。*/
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#include<stdio.h>
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#include<string.h>
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struct student {
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    int num;
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    char name[10];
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    int computer, english, math;
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    double average;
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};
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int Count = 0;
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#define MaxSize 50
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#include "input_output.c"
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#include "computing.c"
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#include "update.c"
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#include "search.c"
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int main(void)
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{
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    struct student students[MaxSize];
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    new_student(students);
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    average(students);
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    sort(students);
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    output_student(students);
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    modify(students);
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    output_student(students);
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    return 0;
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}

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void new_student(struct student students[])
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{
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    int i,n;
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    if(Count == MaxSize){
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        printf("The array is full!\n");
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        return;
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    }
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    printf("Input the Number of Students:");
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    scanf("%d", &n);
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    for(i = 0; i < n; i++){
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        printf("Input the student's num:");
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        scanf("%d", &students[i].num);
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        printf("Input the student's name:");
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        scanf("%s", students[i].name);
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        printf("Input the student's math score:");
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        scanf("%d", &students[i].math);
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        printf("Input the student's english score:");
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        scanf("%d", &students[i].english);
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        printf("Input the student's computer score:");
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        scanf("%d", &students[i].computer);
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        Count++;
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    }
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}
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void output_student(struct student students[])
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{
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    int i;
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    if(Count == 0){
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        printf("Count of students is zero!\n");
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        return;
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    }
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    printf("num\tname\tmath\tenglish\tcomputer\taverage\n");
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    for(i = 0; i < Count; i++){
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        printf("%d\t", students[i].num);
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        printf("%s\t", students[i].name);
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        printf("%d\t", students[i].math);
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        printf("%d\t", students[i].english);
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        printf("%d\t", students[i].computer);
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        printf("%f\t\n", students[i].average);
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    }
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}

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void average(struct student s[])
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{
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    int i;
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    for(i = 0; i < Count; i++){
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        s[i].average = (s[i].math + s[i].english + s[i].computer)/3.0;
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    }
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}

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void modify(struct student* p)
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{
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    int num, course, score, i;
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    printf("Input the number of updated student: ");
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    scanf("%d", &num);
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    printf("Choice the course: 1.math 2.english 3.computer: ");
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    scanf("%d", &course);
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    printf("Input the new score: ");
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    scanf("%d", &score);
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    for (i = 0; i < Count; i++, p++) {
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        if (p->num == num) {
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            break;
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        }
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    }
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    if (i < Count) {
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        switch (course) {
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        case 1: p->math = score; break;
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        case 2: p->english = score; break;
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        case 3: p->computer = score; break;
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        }
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    }
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}
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void sort(struct student s[])
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{
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    struct student temp;
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    int i, index, j;
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    for (i = 0; i < Count - 1; ++i) {
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        index = i;
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        for (j = i + 1; j < Count; j++) {
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            if (s[j].average > s[index].average) {
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                index = j;
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            }
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        }
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        temp = s[index];
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        s[index] = s[i];
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        s[i] = temp;
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    }
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}

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void search_student(struct student students[], int num)
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{
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    int i, flag = 0;
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    if (Count == 0) {
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        printf("Count of students is zero!\n");
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        return;
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    }
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    for (i = 0; i < Count; i++) {
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        if (students[i].num == num) {
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            flag = 1;
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            break;
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        }
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    }
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    if (flag != 0) {
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        printf("num:%d, ", students[i].num);
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        printf("name:%s, ", students[i].name);
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        printf("math:%d, ", students[i].math);
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        printf("english:%d, ", students[i].english);
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        printf("computer:%d, ", students[i].computer);
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        printf("average:%.2f\n", students[i].average);
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    }
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    else {
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        printf("Not Found!");
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    }
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}