smsystem.c

Linux环境下用C语言实现的学生管理系统

#include <unistd.h>
#include <stdio.h>
#include <curses.h>
#include <stdlib.h>
#include <string.h>

#define NAME_LEN 32 //the max length of the name 
#define MAIN_X 13 // the start x coordinate of the main menu
#define MAIN_Y 40 // the start y coordinate of the main menu
#define MENU_ITEM_SUM 5 //the sum of the menu item

typedef struct lesson{ //the struct of the lesson that the student have
	int chinese_score;
	int english_score;
	int math_score;	
}LESSON;

typedef struct student{ //the struct to describe one student
	long sno;  //the NO of the student
	char name[NAME_LEN];
	int age;
	char sex;
	LESSON lesson; 
//	struct student *next;
	
}STUDENT;

STUDENT *student=NULL; //store student info record

int record_sum=0;//record sum
int record_pos=0;//record_position
int cur_pos=0;//current cursor position
int scr_sum=6;//a screen can show six record

int my_init_color(){  //initial color
	if(!has_colors()){ //test the local meschine whether supports the color attribute
		endwin();
		fprintf(stderr,"Error -no color support on this terminal\n");
		return 0;
	}
	if(start_color()!=OK){//initial the color
		endwin();
		fprintf(stderr,"Error-could not initial colors\n");
		return 0;
	}
	return 1;
}

void initial(){ //initial attribute
	initscr();
	clear();
	cbreak();
	nonl();
	intrflush(stdscr,FALSE);
	noecho();
	keypad(stdscr,TRUE);
	my_init_color();
	
	//set color pair including foreground color and background color
	init_pair(1,COLOR_RED,COLOR_BLUE);
	init_pair(2,COLOR_WHITE,COLOR_BLACK);
	init_pair(3,COLOR_RED,COLOR_WHITE);
	init_pair(4,COLOR_BLACK,COLOR_WHITE);
	init_pair(5,COLOR_RED,COLOR_BLUE);
	init_pair(6,COLOR_CYAN,COLOR_BLACK);
	init_pair(7,COLOR_RED,COLOR_BLUE);
}

int mainGUI(){
	int key;
 	initial();
	//create main framework	
	attrset(A_BOLD|COLOR_PAIR(1));
	mvprintw(5,15,"%s","******************** Student Management System *****************");
	mvprintw(25,15,"%s","****************************************************************");
	int i=0;
	for(i=5;i<=25;i++){
		mvaddch(i,15,'*');
		mvaddch(i,79,'*');
	}
	attrset(COLOR_PAIR(1));
	mvprintw(MAIN_X-2,MAIN_Y-3,"%s","Welcome to use this system");
	attroff(A_BOLD);
	char menu[5][21]={"  Add New Student  "," Del Student Info  ","Modify Student Info","Search Student Info","       Quit        "}; //set menu item
	attrset(COLOR_PAIR(3));//the first menu item is selected by default
	mvprintw(MAIN_X+0,MAIN_Y,"%s",menu[0]);
	attrset(COLOR_PAIR(4));
	mvprintw(MAIN_X+1,MAIN_Y,"%s",menu[1]);
	mvprintw(MAIN_X+2,MAIN_Y,"%s",menu[2]);
	mvprintw(MAIN_X+3,MAIN_Y,"%s",menu[3]);
	mvprintw(MAIN_X+4,MAIN_Y,"%s",menu[4]);
	move(MAIN_X,MAIN_Y);
	key=0; //store the current position of the cursor
	refresh();	

	int ch;
	do{
		ch=getch();
		switch(ch){
		case KEY_UP: //up key 
			attrset(COLOR_PAIR(4));
			mvprintw(MAIN_X+key,MAIN_Y,menu[key]);
			key=(key-1+MENU_ITEM_SUM)%MENU_ITEM_SUM;
			attrset(COLOR_PAIR(3));
			mvprintw(MAIN_X+key,MAIN_Y,menu[key]);
			move(MAIN_X+key,MAIN_Y);
			break;	
		case KEY_DOWN: //down key
			attrset(COLOR_PAIR(4));
			mvprintw(MAIN_X+key,MAIN_Y,menu[key]);
			key=(key+1)%MENU_ITEM_SUM;
			attrset(COLOR_PAIR(3));
			mvprintw(MAIN_X+key,MAIN_Y,menu[key]);
			move(MAIN_X+key,MAIN_Y);
			break;	
		case KEY_RIGHT: //the same function with the key KEY_UP
			attrset(COLOR_PAIR(4));
			mvprintw(MAIN_X+key,MAIN_Y,menu[key]);
			key=(key+1)%MENU_ITEM_SUM;
			attrset(COLOR_PAIR(3));
			mvprintw(MAIN_X+key,MAIN_Y,menu[key]);
			move(MAIN_X+key,MAIN_Y);
			break;	
		case KEY_LEFT://the same function with the key KEY_DOWN
			attrset(COLOR_PAIR(4));
			mvprintw(MAIN_X+key,MAIN_Y,menu[key]);
			key=(key-1+MENU_ITEM_SUM)%MENU_ITEM_SUM;
			attrset(COLOR_PAIR(3));
			mvprintw(MAIN_X+key,MAIN_Y,menu[key]);
			move(MAIN_X+key,MAIN_Y);
			break;	
		default:
			break;
		}
		refresh();
	}while(ch!='\r');	
	return key;	
}

void createStudentInfo(){
	char again='y';
	touchwin(stdscr);	
	echo();
	FILE *fp;
	fp=fopen("student.dat","a"); //the file to store the data
	do{
	clear();
	//create the framework
	attrset(A_BOLD|COLOR_PAIR(4));
	mvprintw(3,15,"%s","******************** Student Management System *****************");
	mvprintw(24,15,"%s","****************************************************************");
	int i=0;  //for the loop counter
	for(i=3;i<=24;i++){
		mvaddch(i,15,'*');
		mvaddch(i,79,'*');
	}
	attrset(COLOR_PAIR(2));
	mvprintw(5,37,"%s","Please input a new student info");
	attrset(COLOR_PAIR(3));
	mvprintw(7,30,"%s","SNO:");
	mvprintw(9,30,"%s","Name:");
	mvprintw(11,30,"%s","Age:");
	mvprintw(13,30,"%s","Sex(m/f):");
	mvprintw(15,30,"%s","Chinese_Score:");
	mvprintw(16,30,"%s","English_Score:");
	mvprintw(17,30,"%s","Math_Score:");
	refresh();
	//allocate the memory to store the data
	STUDENT *ptr=(STUDENT *)malloc(sizeof(STUDENT));
/*	ptr->next=NULL;
	if(student_ptr==NULL)
		student_ptr=ptr;
	else{
		ptr->next=student_ptr->next;
		student_ptr->next=ptr;
	}
*/
	attrset(COLOR_PAIR(4));
	
	move(7,34);  //read student NO
	while(!scanw("%ld",&ptr->sno)||ptr->sno>999999||ptr->sno<1){ //test the input NO.
		mvprintw(19,30,"%s","Input data format error!");
		move(7,34);
		clrtoeol();
		mvaddch(7,79,'*');
		move(7,34);
		refresh();
	}	
	move(19,29);
	clrtoeol();
	mvaddch(19,79,'*');
	refresh();

	move(9,35); //read name
	scanw("%s",ptr->name);

	move(11,34);
   	 //read age
	while(!scanw("%d",&ptr->age)){
		mvprintw(19,30,"%s","Input data format error!");
		move(11,34);
		clrtoeol();
		mvaddch(11,79,'*');
		move(11,34);
		refresh();
	}
	move(19,29);
	clrtoeol();
	mvaddch(19,79,'*');
	refresh();

    	move(13,39);  //read gender of the student
	scanw("%c",&ptr->sex);
	while(ptr->sex!='f'&&ptr->sex!='m'){
		mvprintw(19,30,"%s","Input data format error!");	
		move(13,39);
		clrtoeol();
		mvaddch(13,79,'*');
		move(13,39);
		refresh();
		scanw("%c",&ptr->sex);
	}
	move(19,29);
	clrtoeol();
	mvaddch(19,79,'*');
	refresh();
	
	move(15,44);  //read chinese score
	int score;
	while(!scanw("%d",&score)){
		mvprintw(19,30,"%s","Input data format error!");
		move(15,44);
		clrtoeol();
		mvaddch(15,79,'*');
		move(15,44);
		refresh();	
	}
	ptr->lesson.chinese_score=score;
	move(19,29);
	clrtoeol();	
	mvaddch(19,79,'*');
	refresh();
	
	move(16,44); //read english score
	while(!scanw("%d",&score)){
		mvprintw(19,30,"%s","Input data format error!");
		move(16,44);
		clrtoeol();
		mvaddch(16,79,'*');
		move(16,44);
		refresh();
	}
	ptr->lesson.english_score=score;
	move(19,29);
	clrtoeol();
	mvaddch(19,79,'*');
	refresh();
	
	move(17,41);  //read math score
	while(!scanw("%d",&score)){
		mvprintw(19,30,"%s","Input data format error!");
		move(17,41);
		clrtoeol();
		mvaddch(17,79,'*');
		move(17,41);
		refresh();
	}
	ptr->lesson.math_score=score;
	move(19,29);
	clrtoeol();
	mvaddch(19,79,'*');
	
	//write the data to file	
	fwrite(ptr,sizeof(STUDENT),1,fp);
	
	mvprintw(20,30,"%s","Continue to add new student(y/n):");
	scanw("%c",&again);
	refresh();
	}while(again=='y'||again=='Y');
	noecho();
	fclose(fp);
	return;
}

void readStudentRecord(){ //read all the student info from the file
	FILE *fp;
	int alloc_num=1;
	//read data from file
	fp=fopen("student.dat","r");
	record_sum=0;
	while(fread(&student[record_sum],sizeof(STUDENT),1,fp)){
		record_sum++;
		if(record_sum>20*alloc_num){
			student=(STUDENT *)realloc(student,sizeof(STUDENT)*20*alloc_num);
			alloc_num++;
		}
	}
	fclose(fp);	
}

void displayInfo(int i){//dispaly one record info
	//show the selected record information
	attrset(A_BOLD|COLOR_PAIR(6));
	mvprintw(21,23,"the student whose SNO is %ld has information as show.",student[i].sno);
	mvprintw(9,34,"%ld",student[i].sno);
	mvprintw(11,35,"%s",student[i].name);
	mvprintw(13,34,"%d",student[i].age);
	mvprintw(15,39,"%c",student[i].sex);
	mvprintw(17,44,"%d",student[i].lesson.chinese_score);
	mvprintw(18,44,"%d",student[i].lesson.english_score);
	mvprintw(19,41,"%d",student[i].lesson.math_score);
}

void setGUI(char *str,int start_pos){
	clear();
	attrset(A_BOLD|COLOR_PAIR(4)); //set fond and color attribute  
	//create main framework
	mvprintw(5,15,"******************** Student Management System *****************");
	mvprintw(24,15,"****************************************************************");
	int i=0;
	for(i=5;i<=24;i++){
		mvaddch(i,15,'*');
		mvaddch(i,79,'*');
	}
	attrset(COLOR_PAIR(2));
	mvprintw(7,37,"%s",str);
	attrset(COLOR_PAIR(3));
	mvprintw(9,30,"%s","SNO:");
	mvprintw(11,30,"%s","Name:");
	mvprintw(13,30,"%s","Age:");
	mvprintw(15,30,"%s","Sex(m/f):");
	mvprintw(17,30,"%s","Chinese_Score:");
	mvprintw(18,30,"%s","English_Score:");
	mvprintw(19,30,"%s","Math_Score:");

	//create choice sno framework
	attrset(COLOR_PAIR(5));
	mvprintw( 9,61," Choice SNO: ");
	mvprintw(10,61," (Use u or d)");
	mvprintw(11,61,"*************");
	mvprintw(18,61,"*************");
	for(i=0;i<6;i++)
		mvprintw(12+i,61,"*           *");
	for(i=0;i<6&&i<record_sum;i++){
		mvprintw(12+i,61,"* ");
		mvprintw(12+i,63,"%-9ld",student[start_pos+i].sno);
		mvprintw(12+i,72," *");	
	}
	//if have record show the current record
	if(record_sum>0){
		attrset(COLOR_PAIR(6));
		mvprintw(12+cur_pos,61,"* ");
		mvprintw(12+cur_pos,63,"%-9ld",student[record_pos].sno);
		mvprintw(12+cur_pos,72," *");
		displayInfo(record_pos);
	}

	//show the sum of the record	
	attrset(COLOR_PAIR(4));
	mvprintw(19,61," The sum:%-4d",record_sum);
	move(12+cur_pos,62);

	attroff(A_BOLD);
	noecho();
	refresh();
}

void up(char *str){ //reaction to the upper key
	int i,pos;
	//the sum of record less than the num of one screen can show
	if(record_sum==0){
		mvprintw(20,25,"Have no record!");
	}
	//when the sum of the recordless than the sum of one screen can show			
	else if(record_sum<=scr_sum){  			
		record_pos=(record_pos-1+record_sum)%record_sum;
		cur_pos=record_pos;
		setGUI(str,0);
	}		
	else{
		if(cur_pos==0){ //when curosr position on the top 
			if(record_pos==0)
			{
				record_pos=record_sum-1;
				cur_pos=5;  //set cursor position
				setGUI(str,record_sum-scr_sum);
			}
			else{
				record_pos--;
				setGUI(str,record_pos);	
			}
		}
		else{//cursor position is not 0