1. 1.
    0
    #include <stdio.h>
    #include <stdlib.h>

    int main() {

    float s1,s2,a;
    char islem;

    do{

    printf("yapacaginiz islemi seciniz:"); scanf("%s",&islem);
    printf("ilk sayi:"); scanf("%f",&s1);
    printf("ikinci sayi:"); scanf("%f",&s2);
    switch(islem){
    case '+': printf("toplam=%fn",s1+s2); break;
    case '-': printf("fark=%fn",s1-s2); break;
    case '*': printf("carpim=%fn",s1*s2); break;
    case '/': printf("bolum=%fn",s1/s2); break;
    default: printf("hatan");
    }printf("devam edecek misin(1/0)n"); scanf("%f",&a);
    }while(a==1);

    printf("program sonlandi");

    return 0;
    }
    edit=charlı yaptım
    ···
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