Information Management System
A. Code portion
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
typedef struct STU {
char name[20];
char sex[5];
char num[20];
char _class[20];
char score[5];
};
void home(void) { //显示进入画面
printf("\n\n\n\n");
printf("================================================================================\n\n");
printf("================================================================================\n\n");
printf("*************************欢迎使用学生成绩管理系统*******************************\n\n");
printf("-----------------------------------------------------------------制作人:Sogger\n\n");
printf("****************************----Welcome!----************************************\n\n");
printf("================================================================================\n\n");
printf("================================================================================\n\n");
printf(" 请按任意键进入学生成绩管理系统\n\n\n\n\n");
system("pause >nul");
system("cls");
}
void end(void) { //显示结束画面
printf("\n\n\n");
printf("================================================================================\n\n");
printf("================================================================================\n\n");
printf("*************************感谢使用学生成绩管理系统***********************************\n\n");
printf("********************************************************************************\n\n");
printf("================================================================================\n\n");
printf("请按任意键退出学生管理系统\n");
system("pause >nul");
exit(0);
}
void Output(struct STU* stu2) { //对成绩排行进行输出
system("cls");
int i;
printf(" 成绩排行如下\n\n");
printf("\t姓名\t性别\t学号\t\t班级\t\t线代成绩\n");
for (i = 0; i < 10; i++) {
printf(" %s %s %s %s %s\n", stu2[i].name, stu2[i].sex, stu2[i].num, stu2[i]._class, stu2[i].score);
}
}
void ScoreTotal(struct STU* stu) { //对成绩进行排行
struct STU temp;
int i,j;
for (i = 0; i < 9; i++) {
for (int j = i + 1; j < 10; j++) {
if (stu[j].score > stu[i].score) {
temp = stu[j];
stu[j] = stu[i];
stu[i] = temp;
}
}
}
Output(stu);
}
int main() {
FILE* fp;
STU stu[10],stu2[10];
int i,a;
char temp[10][20];
char stu1[10][100];
system("title 学生成绩管理系统"); //设置标题
system("mode con cols=80 lines=25"); //调节窗口高度宽度
system("color F5"); //调节背景和字体颜色
home();
for (i = 0; i < 10; i++) {
printf(" 请录入学生信息\n\n");
printf(" 学生%d\n\n", i+1);
printf(" 姓名\t性别\t学号\t\t班级\t\t线代成绩\n");
printf(" ");
scanf("%s %s %s %s %s", stu[i].name, stu[i].sex, stu[i].num, stu[i]._class, &stu[i].score);
strcpy(temp[i], stu[i].name);
strcat(temp[i], ".txt");
if ((fp = fopen(temp[i], "w+")) == NULL) {
printf("File open error!\n");
exit(0);
}
fprintf(fp, "%s %s %s %s %s", stu[i].name, stu[i].sex, stu[i].num, stu[i]._class, stu[i].score);
if (fclose(fp)) {
printf("Can not close the file!\n");
exit(0);
}
system("cls"); //清空当前界面
}
printf(" 以下是十位同学的信息\n\n");
printf("\t姓名\t性别\t学号\t\t班级\t\t线代成绩\n");
for (i = 0; i < 10; i++) {
if ((fp= fopen(temp[i], "r")) == NULL) {
printf("File open error!\n");
exit(0);
}
strcpy(stu2[i].name, stu[i].name);
fscanf(fp, "%s %s %s %s %s", stu2[i].name, stu2[i].sex, stu2[i].num, stu2[i]._class, stu2[i].score);
printf(" %s %s %s %s %s\n", stu2[i].name, stu2[i].sex, stu2[i].num, stu2[i]._class, stu2[i].score);
}
printf("\n\n\n 是否查看排行？\n 【1】是 【2】 否\n");
printf("\t\t\t\t");
scanf("%d", &a);
if (a == 1) ScoreTotal(stu2);
if (fclose(fp)) {
printf("Can not close the file!\n");
exit(0);
}
system("pause >nul"); //暂停且不显示任何东西
system("cls");
end();
return 0;
} II. Run shot
Brief three .system () function
Function name: system () (to be added to the header file <stdlib.h> must be called)
Function: is actually equivalent to execute a DOS command
Usage: system ( "DOS command");
Here are a few usage:
(1) system ( "color color parameters")
Role: change the background color and text color screen window
Preferences: color attribute specified by two hexadecimal digits, the first background color, text color, compared with the second
Each digit can be any of the following values:
Parameters: 0 = Black 1 Blue 2 = light green = green = 3 = 4 = 5 Red Yellow Purple = 6 = 7 = 8 Gray White
9 = light blue light green A = B = C = light green light reddish purple D = E = F = bright white light yellow
Such as: Add the code system ( "color 9F"), the window screen may be set as the background color blue, the text color is set to white.
Note: 1. If only a given parameter, only set the background color. Such as: system ( "color 9"), the background color is blue, text color change
2. If any of the given parameters, such as: system ( "color"), the command will revert to the default color of the color when starting cmd
(2)system("pause")
Role: to halt the program in order to observe the results of the implementation of the program on the screen
Under normal circumstances, the results will be displayed behind the run: Press any key to continue...
This time is very irritable, obsessive-compulsive disorder watching will be very unhappy, so ...
If you do not want to display the prompt, you can redirect the output using the command:
system("pause >nul");The screen is no longer displayed on the "Press any key to continue..." The tips of the ~ ~ ~ ~
Note: It is nul, not null! ! !
Greater than>, indicates to redirect the output file to another device, such as a printer command results
nul是DOS中的一个虚拟的空设备，">nul"表示把命令产生的屏幕显示信息重定向(>)到虚拟空设备
(nul)，这样在屏幕上就不会显示pause命令的执行结果了~~
(3)system("cls")
作用：清除屏幕信息...
(4)system("title 标题内容")
作用：为程序调试的DOS窗口加上标题
效果如下：、
(5)system("mode con cols=窗口长度 lines=窗口宽度")
作用：调整DOS窗口的高度和宽度
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