stu_mg.cpp

一个管理学生信息的C＋＋源程序。比较完整

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

FILE *fp;
int i;
char ch;

/*Address Struct Definition*/
struct member {
	int number;
	char name[20];
	char telephone[13];
	char address[50];
	char post[6];
}members[50];

void Data_Menu(){
	printf("\n-----------------------------------------------------------\n");
	printf("  1.Add");
	printf("  2.Delete");
	printf("  3.Search");
	printf("  4.Save");
	printf("  5.Exit");
	printf("\n-----------------------------------------------------------\n");
}

void Data_Load()
{
	int j;
	long k;
	fp=fopen("members.txt","rt");
	if(fp!=NULL)
	{
		for(i=1;i<50;i++){
			j=fgetc(fp);
			if(j==EOF){
				return;
			}
			k=i-1;
			fseek(fp,k*sizeof(struct member),SEEK_SET);
			fread(&members[i],sizeof(struct member),1,fp);
		}
	}
	else
	{
		fp=fopen("members.txt","w");
		i=1;
	}
}

void Data_Add(int j)
{
	printf("\n");
	members[j].number=j;
	printf("\n\tNo:%d",j);
 
	printf("\n\tName:");
	scanf("%s",members[j].name);

	printf("\tTelephone:");
	scanf("%s",members[j].telephone);

	printf("\tAddress:");
	scanf("%s",members[j].address);

	printf("\tPost:");
	scanf("%s",members[j].post);
}

void Data_Show(int j)
{
	printf("\n\tNo:%d",members[j].number);
	printf("\n\tName:%s",members[j].name);
	printf("\n\tTelephone:%s",members[j].telephone);
	printf("\n\tAddress:%s",members[j].address);
	printf("\n\tPost:%s",members[j].post);
}

void Data_Save()
{
	int j;
	fp=fopen("members.txt","w");
	for(j=1;j<=i;j++)
	{
		fwrite(&members[j],sizeof(struct member),1,fp);
	}
}

void main()
{
	char *search_name;
	int j,k;
 
	Data_Load();
	i--;
	do
	{
		Data_Menu();
		printf("  Please Choose:");
		ch=getchar();
		switch(ch){
		case '1':
			while(i<50){
				i++;
				Data_Add(i);
				break;
			}
			if(i==50){
				printf("\n\tMessage is Filled!\n");
			}
			break;
		case '2':
			if(i<1)
			{
				printf("\n\tNo Records\n");
				break;
			}
			printf("\n\tDelete No:");
			scanf("%d",&k);
			for(j=k;j<i;j++)
			{
				strcpy(members[j].name,members[j+1].name);
				strcpy(members[j].telephone,members[j+1].telephone);
				strcpy(members[j].address,members[j+1].address);
				strcpy(members[j].post,members[j+1].post);
			}
			i--;
			break;
		case '3':
			printf("\n\tPlease Input Search Name:");
			search_name = (char *)malloc(20);
			gets(search_name);
			for(j=1;j<=i;j++){
				if(strcmp(search_name,members[j].name)==0){
					Data_Show(j);
					break;
				}
			}
			free(search_name);
			break;
		case '4':
			Data_Save();
			printf("  Date is Saved!\n");
			fclose(fp);
			break;
		case '5':
			printf("\n\t");
			printf("  Do You Want To Save Message(y/n)");
			if(getchar()=='y'){
				Data_Save();
			}
			fclose(fp);
			exit(0);
			break;
		default:
			break;
		}
	}while(1);
}