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本人是大一新生刚刚学习c语言不久，感觉写到这个东西还是有些吃力，特地分享一下自己的代码和心得。（大一学生刚接触编程能力有限 仅限初学者交流沟通）
先放代码（编程环境vs2019）
#define _CRT_SECURE_NO_WARNINGS 1
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
int n = 0;
struct student
{
unsigned long long num;
char name[30];
float score;
float sum;
float aver;
};
void shurushuju(struct student stu[], int n);
void sumandave(struct student stu[], int n);
void third(struct student stu[], int n);
void four(struct student stu[], int n);
void chaxun(struct student stu[], int n);
void fenxi(struct student stu[], int n);
int main(void)
{
struct student stu[30];
printf("请输入学生人数：");
scanf("%d", &n);
while (1)
{
int A = 0;
printf(" 欢迎来到 《《《《天工大成绩管理系统》》》》\n");
printf(" ************************************************\n");
printf(" 1.Input record\n");
printf(" 2.Caculate total and average score of course\n");
printf(" 3.Sort in descending order by score\n");
printf(" 4.Sort in ascending order by number\n");
printf(" 5.Search by number\n");
printf(" 6.Statistic analysis\n");
printf(" 7.List record(第七个功能和题设违背 写不了)\n");
printf(" 0.Exit\n");
printf(" ************************************************\n");
printf(" 请输入你的选择序号:");
scanf("%d", &A);
switch (A)
{
case 1:
shurushuju(stu, n);
break;
case 2:
sumandave(stu, n);
break;
case 3:
third(stu, n);
break;
case 4:
four(stu, n);
break;
case 5:
chaxun(stu, n);
break;
case 6:
fenxi(stu, n);
break;
case 0:
exit(0);
default:printf("error");
}
}
return 0;
}
//输入基础数据到结构体里
void shurushuju(struct student stu[], int n)
{
int i = 0;
printf("输入学号 姓名 成绩:\n");
for (i = 0;i< n;i++)
{
scanf("%lld %s %f", &stu[i].num, stu[i].name, &stu[i].score);
printf("%lld,%s,%.1f已录入！", stu[i].num, stu[i].name, stu[i].score);
getchar();
}
}
//负责计算总和以及平均数
void sumandave(struct student stu[], int n)
{
float stuTemp1 = 0;
float aver1;
int j;
for (j = 0;j< n;j++)
{
stuTemp1 += stu[j].score;
};
aver1 = stuTemp1 / n;
printf("总和是%.1f 平均分是%.1f\n", stuTemp1, aver1);
getchar();
}
//冒泡排序 刚学会
void third(struct student stu[], int n)
{
int i, j;
struct student stuTemp;
for (i = 0;i< n - 1;i++)
{
for (j = 0;j< n - 1 - i;j++)
{
if ((stu[j].score)< (stu[j + 1].score))
{
stuTemp = stu[j];
stu[j] = stu[j + 1];
stu[j + 1] = stuTemp;
}
}
}
for (i = 0; i< n; i++)
{
printf("%lld %s %.1f\n", stu[i].num, stu[i].name, stu[i].score);
}
}
//按照学号从小到大排列成绩表
void four(struct student stu[], int n)
{
int i, j;
struct student stuTemp2;
for (i = 0;i< n - 1;i++)
{
for (j = 0;j< n - 1 - i;j++)
{
if ((stu[j].num) >(stu[j + 1].num))
{
stuTemp2 = stu[j];
stu[j] = stu[j + 1];
stu[j + 1] = stuTemp2;
}
}
}
for (i = 0; i< n; i++)
{
printf("%lld %s %.1f\n", stu[i].num, stu[i].name, stu[i].score);
}
}
//通过学号查询学生成绩等信息
void chaxun(struct student stu[], int n)
{
unsigned long long point;
int i = 1;
int j = 0;
while (i)
{
printf("请先输入学号");
scanf("%lld", &point);
for (j = 0;j< n;j++)
{
if (point == stu[j].num)
{
printf("%lld %s %.1f\n", stu[j].num, stu[j].name, stu[j].score);
}
}
}
}
//分析一波
void fenxi(struct student stu[], int n)
{
int A = 0, B = 0, C = 0, D = 0, E = 0, i = 0;
for (i = 0;i< n;i++)
{
if (stu[i].score<= 100 && stu[i].score >= 90)
A++;
if (stu[i].score<= 89 && stu[i].score >= 80)
B++;
if (stu[i].score<= 79 && stu[i].score >= 70)
C++;
if (stu[i].score<= 69 && stu[i].score >= 60)
D++;
if (stu[i].score<= 59 && stu[i].score >= 0)
E++;
}
printf("每个类别的人数有\nA:%d人\nB:%d人\nC:%d人\nD:%d人\nE:%d人\n ", A, B, C, D, E);
float a = 0, b = 0, c = 0, d = 0, e = 0;
a = 100 * A / n;
b = 100 * B / n;
c = 100 * C / n;
d = 100 * D / n;
e = 100 * E / n;
printf("每个类别所占百分比是\nA:%.1f%%\nB:%.1f%%\nC:%.1f%%\nD:%.1f%%\nE:%.1f%%\n", a, b, c, d, e);
}
涉及到一些知识点
比如说
1冒泡排序
2使用类似stu[i].score 去获取结构体的数据
3名字是用字符串类型定义的 字符串都是使用数组 所以定义结构体一开始name都有[] 一开始不太清楚胡乱去加没有理解清楚其中的意义
4因为我们学校学号位数超越了长整型 一开始一直乱码 所以选用了更大的unsigined long long 后续输出符也注意是%lld
最后欢迎初学者一起交流
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