图书管理系统 C语言

#include <stdio.h> #include <string.h> #include <stdlib.h> #define N 10 struct library { int num; char book_name[30]; char writer[30]; char sort_num[3]; char pub_company[30]; char pub_time[30]; char price[30]; }; typedef struct library LIB; LIB lib[N]; FILE *fp; int all=0; int menu(void); void input(void); void output(void); void save(void); void del(void); void search(void); void xiugai(void); /*void sort(void);*/ main() { for(;;) { switch(menu()) { case 1:input();break; case 2:output();break; case 3:save();break; case 4:search();break; case 5:xiugai();break; case 6:del();break; /* case 7:sort();break; */ case 0:exit(1);break; } } } int menu(void) { char m[3]; int n; printf("\t\t1:input\n"); printf("\t\t2:output\n"); printf("\t\t3:save\n"); printf("\t\t4:search\n"); printf("\t\t5:xiugai\n"); printf("\t\t6:del\n"); printf("\t\t7:sort\n"); printf("\t\t0:exit\n"); printf("\t\tplease choose a operation(0-7):\n"); scanf("%s",m); n=atoi(m); return(n); } void input(void) { int i; char m[3]; for(i=all;i<N;i++) { all++; clrscr(); printf("please input informations:\n"); printf("\t\tnum:\n"); scanf("%d",&lib[i].num); printf("\t\tbook_name:\n"); scanf("%s",lib[i].book_name); printf("\t\twriter:\n"); scanf("%s",lib[i].writer); printf("\t\tsort_num:\n"); scanf("%s",lib[i].sort_num); printf("\t\tpub_company:\n"); scanf("%s",lib[i].pub_company); printf("\t\tpub_time:\n"); scanf("%s",lib[i].pub_time); printf("\t\tprice:\n"); scanf("%s",lib[i].price); a: printf("\t\tyes/no continue input?\n"); printf("\t\t1:yes\n"); printf("\t\t2:no\n"); scanf("%s",m); if(atoi(m)==1) continue; else if(atoi(m)==2) return; else { printf("\t\tinput error!\n"); goto a; } } } void output(void) { int i; for(i=0;i<all;i++) { printf("\t\t%d\n",lib[i].num); printf("%s\t\t%s\t\t%s\n",lib[i].book_name,lib[i].writer,lib[i].sort_num); printf("%s\t\t%s\t\t%s\n",lib[i].pub_company,lib[i].pub_time,lib[i].price); } } void save(void) { int i; if((fp=fopen("file.c","wb"))==NULL) { printf("can not open the file"); exit(1); } for(i=0;i<all;i++) { if(fwrite(&lib[i],sizeof(LIB),1,fp)!=1) { printf("can not write!"); exit(1); } } fclose(fp); printf("You have successful to save it!\n"); } void search(void) { int i,flag; char m[3]; char name[30]; clrscr(); printf("\t\tplease choose your way of search:\n"); printf("\t\t1:by book_name!\n"); printf("\t\t2:by writer!\n"); scanf("%s",m); i=atoi(m); switch(i) { case 1:{ printf("\t\tplease input the book_name:\n"); scanf("%s",name); flag=0; for(i=0;i<N;i++) { if(strcmp(name,lib[i].book_name)==0) { printf("\t\t%d\n",lib[i].num); printf("%s\t\t%s\t\t%s\n",lib[i].book_name,lib[i].writer,lib[i].sort_num); printf("%s\t\t%s\t\t%s\n",lib[i].pub_company,lib[i].pub_time,lib[i].price); flag=1;break; } } if(flag==0) printf("\t\tnot find the book!\n"); } case 2:{ printf("\t\tplease input the writer:\n"); scanf("%s",name); flag=0; for(i=0;i<N;i++) { if(strcmp(name,lib[i].writer)==0) { printf("\t\t%d\n",lib[i].num); printf("%s\t\t%s\t\t%s\n",lib[i].book_name,lib[i].writer,lib[i].sort_num); printf("%s\t\t%s\t\t%s\n",lib[i].pub_company,lib[i].pub_time,lib[i].price); flag=1;break; } } if(flag==0) printf("\t\tnot find the wtiter!\n"); } } } void xiugai(void) { int i,flag; char name[30],n[3]; clrscr(); printf("\t\tplease input the book_name of xiugai :\n"); scanf("%s",name); flag=0; for(i=0;i<N;i++) { if(strcmp(name,lib[i].book_name)==0) { printf("\t\t%d\n",lib[i].num); printf("%s\t\t%s\t\t%s\n",lib[i].book_name,lib[i].writer,lib[i].sort_num); printf("%s\t\t%s\t\t%s\n",lib[i].pub_company,lib[i].pub_time,lib[i].price); printf("\t\tplease input xiugai's the informations:\n"); printf("\t\tnum:\n"); scanf("%d",&lib[i].num); printf("\t\tbook_name:\n"); scanf("%s",lib[i].book_name); printf("\t\twriter:\n"); scanf("%s",lib[i].writer); printf("\t\tsort_num:\n"); scanf("%s",lib[i].sort_num); printf("\t\tpub_company:\n"); scanf("%s",lib[i].pub_company); printf("\t\tpub_time:\n"); scanf("%s",lib[i].pub_time); printf("\t\tprice:\n"); scanf("%s",lib[i].price); flag=1;break; } } if(flag==0) printf("\t\tnot find xiugai's the book!\n"); } void del(void) { int i,j,flag; char name[30]; clrscr(); printf("\t\tplease input the book_name of del:\n"); scanf("%s",name); flag=0; for(i=0;i<N;i++) { if(strcmp(name,lib[i].book_name)==0) { printf("\t\t%d\n",lib[i].num); printf("%s\t\t%s\t\t%s\n",lib[i].book_name,lib[i].writer,lib[i].sort_num); printf("%s\t\t%s\t\t%s\n",lib[i].pub_company,lib[i].pub_time,lib[i].price); for(j=N;j>i;j--) { lib[j-1].num=lib[j].num; strcpy(lib[j-1].book_name,lib[j].book_name); strcpy(lib[j-1].writer,lib[j].writer); strcpy(lib[j-1].sort_num,lib[j].sort_num); strcpy(lib[j-1].pub_company,lib[j].pub_company); strcpy(lib[j-1].pub_time,lib[j].pub_time); strcpy(lib[j-1].price,lib[j].price); flag=1; printf("\t\tdel ok!\n"); break; } } } if(flag==0) printf("\t\tno information of the book!\n"); }