C/C++ İle Basit Programlar

//Toplama işlemi
#include <iostream>
using namespace std;

int main() {
    double a,b;
    cout << "Birinci Sayi : ";
    cin >> a;
    cout << "Ikinci Sayi : ";
    cin >> b;
    cout << "Toplam : " << a+b;
    system("PAUSE");
    return 0;
}

//Adres Defteri
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#define SIZE 100

struct list_type {
    char adi[10];
    char soyadi[10];
    char sehir[12];
    char telefon[11];
} list[SIZE];

int menu(voıd);
voıd init_list(voıd);
voıd enter(voıd);
voıd arama(voıd);
voıd iptal(voıd);
voıd display(voıd);
voıd save(voıd);
voıd load(voıd);

voıd main(voıd) {
    char choice;
    init_list();

    for(;;) {
    choice = menu();
        switch(choice) {
            case 'i':iptal();break;
            case 'a':arama();break;
            case 'g':enter();break;
            case 'l':display();break;
            case 's':save();break;
            case 'c':load();break;
            case 'q':exit(0);
        }
    }
}

voıd init_list(voıd) {
    register int t;
    for(t=0; t<SIZE; t++)
        *list[t].adi = İ\0';
}

voıd enter(voıd) {
    register int i;
    for(i=0; i<SIZE; i++)
        if (!*list[i].adi) 
            break;
        if (i==SIZE){
            printf("Liste dolu\n");
            return;
        }
    clrscr();
    printf("Adiniz.....:");
    gets(list[i].adi);
    printf("Soyadi.....:");
    gets(list[i].soyadi);
    printf("Sehir......:");
    gets(list[i].sehir);
    printf("Telefon....:");
    gets(list[i].telefon);
}

voıd arama(voıd) {
    char ara[10];
    FILE *fp;
    register int t;
    int a;
    clrscr();
    printf("\n Aradiginiz Kisinin Adini Giriniz:");
    gets(ara);
    for(t=0;t<SIZE;t++) {
        if (strstr(list[t].adi,ara)) {
            clrscr;
            printf("\n Adi=%s",list[t].adi);
            printf("\n Soyadi=%s",list[t].soyadi);
            printf("\n Sehir=%s",list[t].sehir);
            printf("\n Telefon=%s",list[t].telefon);
            getch();
        a=1;
        }
    }
    if (a!=1) {
        printf("\n Aradiginiz Kayit Yok");
        getch();
    }
}

voıd iptal(voıd) {
    char ara[10];
    register int t;
    int a;
    clrscr();
    printf("Sileceginiz Kisinin Adini Girin:");
    gets(ara);

    for(t=0;t<SIZE;t++) {
        if(strstr(list[t].adi,ara)) {
            a=1;
            *list[t].adi=İ\0';
            *list[t].soyadi=İ\0';
            *list[t].sehir=İ\0';
            *list[t].telefon=İ\0';
        }
    }
    if (a!=1) 
        printf("\n Sileceginiz Kayit Bulunamadi");
}

voıd display(voıd) {
    register int t;
    for(t=0;t<SIZE;t++) {
        if (*list[t].adi) {
            clrscr();
            printf("%s \n",list[t].adi);
            printf("%s \n",list[t].soyadi);
            printf("%s \n",list[t].sehir);
            printf("%s \n",list[t].telefon);}}
            getch();
        }
voıd save(voıd) {
    FILE *fp;
    register int i;
    if((fp=fopen("maillist","wb"))==NULL) {
        printf("\n dosya acilamiyor\n");
        return;
    }
    for(i=0; i<SIZE; i++)
        if(*list[i].adi)
        if (fwrite(&list[i],sizeof(struct list_type),1,fp) != 1)
            printf("yazma hatasi!\n");
}
voıd load(voıd) {
    FILE *fp;register int i;
    if ((fp=fopen("maillist","rb")) == NULL) {
        printf("dosya acilamiyor!\n");
        return;
    }
    init_list();
    for (i=0;i<SIZE;i++)
        if(fread(&list[i],sizeof(struct list_type),1,fp) != 1) {
            if (feof(fp)) return;
            printf("dosya okuma hatasi!\n");}
}

int menu(voıd) {
    char s[80]; 
    do {
        textcolor(14);
        textbackground(1);
        clrscr();
        gotoxy(23,5);printf("TELEFON DEFTERI");
        gotoxy(25,6);printf("(G)iris\n");
        gotoxy(25,7);printf("(L)istele\n");
        gotoxy(25,8);printf("(C)agir\n");
        gotoxy(25,9);printf("(S)akla\n");
        gotoxy(25,10);printf("(A)rama\n");
        gotoxy(25,11);printf("(I)ptal\n");
        gotoxy(25,12);printf("(C)ikis\n");
        gotoxy(23,13);printf("Seciminiz.:");
        gets(s);
    } while(!strchr("GLCSAIQ",toupper(*s)));
    return(*s);
}

// Gün Sayımı
#include <stdio.h>
#include <time.h>

int main () {
struct tm *zaman;
time_t an;
int gun_say;

time(&an);
zaman = localtime(&an);
printf ("Su Anda Tarih Ve Saat : %s", asctime(zaman));
printf ("Kac Gun Ileriyi Gormek Istiyorsunuz? ");
scanf ("%d",&gun_say);
(*zaman).tm_mday = (*zaman).tm_mday + gun_say;

printf("%d Gun Sonra Saat ve Tarih : %s", gun_say, asctime(zaman));

system("PAUSE");
return 0; 
}