Создать класс - C++ - Ответ 6295548

#include <iostream>
#include <conio.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <fstream>
 
int n=2;
using namespace std;
class library
{
public:
char shifr[25];
char avtor[25];
char avtor_z[25];
char nazvanie[25];
int god,god_z;
char mesto[25];
char nazvanie_z[25];
    char avtor_x[25];
    char nazvanie_y[25];
    void sh(char* str){strcpy(shifr,str);}
    char* sh2(){return shifr;}
    void avt(char* str){strcpy(avtor,str);}
    char* avt2(){return avtor;}
    void avto(char* str){strcpy(avtor_z,str);}
    char* avto2(){return avtor_z;}
    void nazv(char* str){strcpy(nazvanie,str);}
    char* nazv2(){return nazvanie;}
    void gd(int a){god=a;}
    int gd2(){return god;}
    void mes(char* str){strcpy(mesto,str);}
    char* mes2(){return mesto;}
};
 
void vvod()
{
 FILE *fp;
    fp=fopen("library.txt","wb");
    int i;
    char shifr[25],avtor[25],nazvanie[25],mesto[25];int god;
    library *vk;
    vk=new library[n];
    for(i=0;i<n;i++){
        cout<<"Shifr knigi: ";cin>>shifr;
        cout<<"Avtor: ";cin>>avtor;
        cout<<"Nazvanie: ";cin>>nazvanie;
        cout<<"God izdaniy: ";cin>>god;
        cout<<"Mesto raspologeniy: "; cin>>mesto;cout<<"\n";
        vk[i].sh(shifr);
        vk[i].avt(avtor);
        vk[i].nazv(nazvanie);
        vk[i].gd(god);
        vk[i].mes(mesto);
        fwrite(&vk[i],sizeof(library),1,fp);
    }fclose(fp);
}
 
void vivod()
{
    FILE *fp;
    int i;
    library *vk;
    vk=new library[n];
    fp=fopen("library.txt","r");
    for(i=0;i<n;i++){
       fread(&vk[i],sizeof(library),1,fp);
    }
    for(i=0;i<n;i++){
        cout<<"Shifr knigi: "<<vk[i].sh2()<<"\n";
        cout<<"Avtor: "<<vk[i].avt2()<<"\n";
        cout<<"Nazvanie: "<<vk[i].nazv2()<<"\n";
        cout<<"God izdaniy: "<<vk[i].gd2()<<"\n";
        cout<<"Mesto raspologeniy: "<<vk[i].mes2();cout<<"\n\n";
    }fclose(fp);
}
 
void udal()
{
 int i,kol=0;
    library *vk;int k;
    vk=new library[n];
    FILE *fp;
    fp=fopen("library.txt","r");
    for(i=0;i<n;i++){
      fread(&vk[i],sizeof(library),1,fp);
    } fclose(fp);
    fp=fopen("library.txt","wb");
    cout<<"Kakuy zapis udalit?";cin>>k;
    for(i=0;i<n;i++){
            if(i!=k){
      fwrite(&vk[i],sizeof(library),1,fp);
            }
    }fclose(fp);n-=1;
}
 
void dobavit()
{
   FILE *fp,*fp1;
    int i,j;
    char shifr[25],avtor[25],nazvanie[25],mesto[25];int god;
    library *vk;
    vk=new library[n+1];
    fp1=fopen("library.txt","r");
    for(i=0;i<n;i++){
       fread(&vk[i],sizeof(library),1,fp1);
    }fclose(fp1);
        cout<<"Shifr knigi: ";cin>>shifr;
        cout<<"Avtor: ";cin>>avtor;
        cout<<"Nazvanie: ";cin>>nazvanie;
        cout<<"God izdaniy: ";cin>>god;
        cout<<"Mesto raspologeniy: "; cin>>mesto;cout<<"\n";
        vk[n].sh(shifr);
        vk[n].avt(avtor);
        vk[n].nazv(nazvanie);
        vk[n].gd(god);
        vk[n].mes(mesto);
        fp=fopen("library.txt","wb");
        for(i=0;i<=n;i++){
        cout<<"Shifr knigi: "<<vk[i].sh2()<<"\n";
        cout<<"Avtor: "<<vk[i].avt2()<<"\n";
        cout<<"Nazvanie: "<<vk[i].nazv2()<<"\n";
        cout<<"God izdaniy: "<<vk[i].gd2()<<"\n";
        cout<<"Mesto raspologeniy: "<<vk[i].mes2();cout<<"\n\n";
      fwrite(&vk[i],sizeof(library),1,fp);
            }
    fclose(fp);n+=1;
}
 
int zadanie1()
{
FILE *fp,*fp1;
int i;
char avtor_z[25];
library *vk;
fp1=fopen("library.txt","r");
fp=fopen("zadanie1.txt","wt");
for(i=0;i<n;i++)
fread(&vk[i],sizeof(library),1,fp1);
printf("Avtor: ");
scanf("%s",&vk[i].avtor_z);
fprintf(fp,"Spisok knig avtora %s:\n", vk[i].avtor_z);
for(i=0;i<n;i++)
if(!strcmp(vk[i].avtor_z,vk[i].avtor))
fprintf(fp,"%s\n",vk[i].nazvanie);
fclose(fp);fclose(fp1);
return 0;
}
 
int zadanie2()
{
    FILE *fp,*fp1;
    int i,k=0;
    int god_z;
    char nazvanie[25];
    library *vk;
    fp1=fopen("library.txt","rb");
    fp=fopen("zadanie2.txt","wt");
    for(i=0;i<n;i++)
        fread(&vk[i],sizeof(library),1,fp1);
         printf("Vvedite god: ");scanf("%d",god_z);
    fprintf(fp,"Chislo knig opredelennogo goda izdaniya: ");
    for(i=0;i<n;i++)
        if(vk[i].god_z==vk[i].god)
            k+=1;
        fprintf(fp," %d\n",k);
   getchar();
    return 0;
}
 
int zadanie3()
{
    FILE *fp,*fp1;
    int i,k;
    library *vk;
    char nazvanie_z[25];
    fp=fopen("library.txt","rb");
    fp1=fopen("zadanie3.txt","wt");
    for(i=0;i<n;i++)
        fread(&vk[i],sizeof(library),1,fp);
    fprintf(fp1,"Chislo knig opredelennogo nazvaniya: ");
    for(i=0;i<n;i++)
        if(vk[i].nazvanie==vk[i].nazvanie_z)
            k+=1;
        fprintf(fp1,"%s\n",k);
    getch();
    return 0;
}
 
int zadanie4()
{
    FILE *fp,*fp1;
    int i;
    library *vk;
    char avtor_x[25];
    char nazvanie_y[25];
    fp=fopen("library.txt","rb");
    fp1=fopen("zadanie4.txt","wt");
    printf("Vvedite avtora_x: ");scanf("%s",&avtor_x);
    printf("Vvedite nazvanie_y: ");scanf("%s",&nazvanie_y);
    for(i=0;i<n;i++)
        fread(&vk[i],sizeof(library),1,fp);
    fprintf(fp1,"Kniga avtora: %s",avtor_x,"\nNazvaniya: %s",nazvanie_y);
    for(i=0;i<n;i++)
        if(vk[i].nazvanie==vk[i].nazvanie_y)
        printf("Est' v nalichie!");
    fclose(fp);fclose(fp1);
    return 0;
}
 
int main()
{   int shifr;
    vvod();
    cout<<n<<"\n";
    cout<<"______MENU______";
    cout<<"\n1.Vivod dannix"<<"\n2.Udalit"<<"\n3.Dobavit"<<"\n4.Zadanie1"<<"\n5.Zadanie2"<<"\n6.Zadanie3"<<"\n7.Zadanie4"<<"\n8.Exit\n";
    cin>>shifr;
    while(shifr!=8)
    {
    switch(shifr)
    {
    case 1:vivod();break;
    case 2:udal();break;
    case 3:dobavit();break;
    case 4:zadanie1();break;
    case 5:zadanie2();break;
    case 6:zadanie3();break;
    case 7:zadanie4();break;
    case 8:break;
    }cout<<"\n______MENU______";
    cout<<"\n1.Vivod dannix"<<"\n2.Udalit"<<"\n3.Dobavit"<<"\n4.Zadanie1"<<"\n5.Zadanie2"<<"\n6.Zadanie3"<<"\n7.Zadanie4"<<"\n8.Exit\n";cin>>shifr;}
    return 0;
}