first commit

电子英汉词典设计.cpp

@@ -0,0 +1,265 @@
+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+#include<conio.h>
+#define LEN sizeof(struct info)
+struct info
+{
+	char word[40];
+	char mean[40];
+};
+struct info inf[400];
+int m=0;
+void enter();
+void add();
+void Delete();
+void Edit();
+void enter()
+{
+	int i,m=0;
+	char n;
+	char to[40];
+	printf("请输入单词: ");
+	scanf("%s",to);
+	FILE *fp;
+	if((fp=fopen("data.txt","ab+"))==NULL)
+	{
+		printf("文件不存在!\n");
+		exit(1);
+	}
+	while(!feof(fp))
+	{
+		if(fread(&inf[m],LEN,1,fp)==1)
+		{
+			if(strcmp(to,inf[m].word)==0)
+			{
+				printf("%s    ",to);
+			    printf("%s\n",inf[m].mean);
+			    printf("是否继续?");
+			    printf("按Y或y表示继续,按其它键返回\n"); 
+			    fclose(fp);
+			    return;
+		    }
+		}
+		m++;
+	}
+	printf("无此单词!\n");
+	printf("是否继续?");
+	printf("按Y或y表示继续,按其它键返回\n"); 
+	fclose(fp);
+	return;
+	if(m==0)
+	printf("文件中无记录!\n");
+	if((fp=fopen("data.txt","ab+"))==NULL)
+	{
+		printf("文件不存在!\n");
+		return;
+	}
+	fclose(fp);
+}
+void add()
+{
+	int i;
+	char n[20];
+	FILE *fp;
+	if((fp=fopen("data.txt","ab+"))==NULL)
+	{
+		printf("文件不存在!\n");
+		exit(0);
+	}
+	printf("请输入单词: \n");
+	scanf("%s",n);
+	while(!feof(fp))
+	{
+		if(fread(&inf[m],LEN,1,fp)==1)
+		{
+			if(strcmp(n,inf[m].word)==0)
+			{
+				printf("已有此单词，是否进行修改?\n");
+				printf("1. 是 2. 否\n");
+				scanf("%d",&i);
+				switch(i)
+				{
+					case 1:
+						Edit();
+					case 2:						
+						break;
+				}
+			    printf("是否继续增添?");
+			    printf("按Y或y表示继续,按其它键返回\n"); 
+			    fclose(fp);
+			    return;
+		    }
+		}
+		m++;
+	}
+	printf("请输入释义：\n");
+	scanf("%s",inf[m].mean);
+	strcpy(inf[m].word,n);
+	if(fwrite(&inf[m],LEN,1,fp)!=1)
+	{
+		printf("不能保存"); 
+	}
+	else
+	{
+	printf("已保存\n是否继续添加？");
+	printf("按Y或y表示继续,按其它键返回\n");
+	}
+	fclose(fp);	
+}
+void Delete()
+{
+	FILE *fp,*ft;
+	char n[40],k[40];
+	int m=0,l=0,i;
+	printf("请输入要删除的单词：\n");
+	scanf("%s",n); 
+	fp=fopen("data.txt","rb+");
+	ft=fopen("123.txt","wb+");
+	if(fp==NULL||ft==NULL)
+	{
+		printf("文件不存在!\n");
+		exit(1);
+	}
+		printf("是否删除此单词？谨慎考虑！\n");
+		printf("\t1.是");
+		printf("\t\t2.否\n");
+		scanf("%d",&i); 
+		switch(i)
+		{
+		case 1:
+		while(fread(k,sizeof(k),1,fp))
+		{
+			if(strcmp(k,n)!=0)
+			{
+				fwrite(k,sizeof(k),1,ft);
+				m++;
+			}
+			else
+			{
+				rewind(fp);
+				fseek(fp,sizeof(k)*(m+2),0);	
+			}
+		}
+		fclose(fp);
+		fclose(ft);
+		remove("data.txt");
+		rename("123.txt","data.txt");
+		printf("删除成功");
+		break;
+		case 2:break;
+	}	
+		printf("是否继续?\n");
+		printf("按Y或y表示继续,按其它键返回\n");
+		return;
+}
+void Edit()
+{
+	int t,a,m=0;
+	char n[40],k[40];
+	FILE *fp;
+	printf("请输入要修改的单词：");	
+	scanf("%s",n);
+	if((fp=fopen("data.txt","rb+"))==NULL)
+	{
+		printf("文件不存在!\n");
+		exit(1);
+	}
+	rewind(fp);
+	while(!feof(fp))
+	{ 
+	if(fread(&inf[m],LEN,1,fp)==1)
+	if(strcmp(n,inf[m].word)==0)
+	{
+		printf("是否修改释义？\n");
+		printf("\t1.是.");
+		printf("\t\t2.否.\n");			
+		scanf("%d",&a);
+		switch(a)
+		{
+		case 1:printf("请输入修改后的释义：");
+		scanf("%s",k);
+		strcpy(inf[m].mean,k);
+		t=sizeof(inf[m].mean);
+		fseek(fp,-t,1);
+		if(fwrite(&inf[m].mean,t,1,fp)==1)
+		printf("修改成功!");
+		break;
+		case 2:
+		break;
+		}
+		printf("是否继续?\n");
+		printf("按Y或y表示继续,按其它键返回\n");
+		fclose(fp);	
+		return;
+	}
+	m++;
+    }
+	printf("无此单词\n");
+	printf("是否继续修改?\n");
+	printf("输入y或Y继续操作，输入其他返回菜单\n");
+	fclose(fp);
+	return;
+}
+int main(void)
+{
+int choice;
+char n[2];
+do
+{
+printf("\n\t           ==============================");
+printf("\n\t           *欢迎使用有限规模电子英汉词典*");
+printf("\n\t           ==============================\n");
+printf("\n\t           ***********菜单显示***********\n");
+printf("\n\t           ********【1】词条查找*********\n");
+printf("\n\t           ********【2】词条增词*********\n");
+printf("\n\t           ********【3】词条删除*********\n");
+printf("\n\t           ********【4】词条修改*********\n");
+printf("\n\t           ********【0】退出词典*********\n"); 
+printf("请选择你要进行的功能：");
+scanf("%d",&choice);
+switch(choice)
+{
+	case 1:
+	   enter();
+	   scanf("%s",&n);
+	   while(n[0]=='Y'||n[0]=='y')
+	   {
+		  enter();
+		  scanf("%s",&n);
+	   } 
+	   break;
+	case 2:
+	   add();
+	   m++;
+       scanf("%s",&n);
+       while(n[0]=='Y'||n[0]=='y')
+	   {
+		  add();
+		  m++; 
+		  scanf("%s",&n);
+	   }
+ 	   break;
+	case 3:
+	   Delete();
+	   scanf("%s",&n);
+	   while(n[0]=='Y'||n[0]=='y')
+	   {
+		  Delete();
+		  scanf("%s",&n);
+	   } 
+	   break;
+	case 4:
+	   Edit();
+	   scanf("%s",&n);
+	   while(n[0]=='Y'||n[0]=='y')
+	   {
+		  Edit();
+		  scanf("%s",&n);
+	   } 
+	   break;
+	}	
+}while(choice!=0);
+return 0;
+}
+