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法学使用 switch 语句编写图书管理系统 C 程序
问题
如何使用 C 编程存储库中与图书馆相关的书籍信息。
算法
Step 1: Declare a structure which holds data members Step 2: declare variables which are used for loop Step 3: use switch case to work on each module Step 4: case 1- for Adding book information Case 2- for Display book information Case 3- for Finding number for books in library Case 4- for EXIT
程序
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<string.h>
struct library{
char bookname[50];
char author[50];
int noofpages;
float price;
};
int main(){
struct library lib[100];
char bookname[30];
int i,j, keepcount;
i=j=keepcount = 0;
while(j!=6){
printf("
1. Add book information
");
printf("2.Display book information
");
printf("3. no of books in the library
");
printf("4. Exit");
printf ("
Enter one of the above : ");
scanf("%d",&j);
switch (j){
/* Add book */
case 1:
printf ("Enter book name = ");
scanf ("%s",lib[i].bookname);
printf ("Enter author name = ");
scanf ("%s",lib[i].author);
printf ("Enter pages = ");
scanf ("%d",&lib[i].noofpages);
printf ("Enter price = ");
scanf ("%f",&lib[i].price);
keepcount++;
i++;
break;
case 2:
printf("you have entered the following information
");
for(i=0; i<keepcount; i++){
printf ("book name = %s
",lib[i].bookname);
printf ("\t author name = %s
",lib[i].author);
printf ("\t pages = %d
",lib[i].noofpages);
printf ("\t price = %f
",lib[i].price);
}
break;
case 3:
printf("
No of books in library : %d", keepcount);
break;
case 4:
exit (0);
}
}
return 0;
}产出
1. Add book information 2.Display book information 3. no of books in the library 4. Exit Enter one of the above : 1 Enter book name = HarryPotter Enter author name = hp Enter pages = 250 Enter price = 350.6 1. Add book information 2.Display book information 3. no of books in the library 4. Exit Enter one of the above : 2 you have entered the following information book name = HarryPotter author name = hp pages = 250 price = 350.600006 1. Add book information 2.Display book information 3. no of books in the library 4. Exit Enter one of the above : 3 No of books in library : 1 1. Add book information 2.Display book information 3. no of books in the library 4. Exit Enter one of the above : 4
更新日期： 2021-03-05
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