Calculator

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
int main(void)
{

  char secim=0;
  float sayi1,sayi2,toplam,fark,carp,bolum;
 int top=0,fak=0,car=0,bol=0 ;
 
 
  while(atoi(&secim)!=-1){
 

  printf("Press\n1 for addition\n");
  printf("2 for Subtraction \n");
  printf("3 for Division\n");
  printf("4 for Multiplication\n");
  printf("-1 to Exit\n\n");
 
 

  printf("Choose an operation");
    scanf("%s",&secim);
if(atoi(&secim)>=0&&atoi(&secim)<=4){
printf("Enter first number:");
   scanf("%f",&sayi1);
   printf("Enter second number:");
   scanf("%f",&sayi2);

}
 
 
   
    system("cls");
  if(atoi(&secim)==1){
  top++;
  system("cls");
    toplam=(sayi1+sayi2);
    printf("\n%.2f+%.2f=%f\n\n\n",sayi1,sayi2,toplam);
   
  } else if(atoi(&secim)==2) {
  fak++;
  system("cls");
  fark=sayi1-sayi2;
  printf("\n(%.2f)-(%.2f)=%f\n\n\n",sayi1,sayi2,fark);
  }
 
  else if(atoi(&secim)==3) {
  system("cls");
  bolum=sayi1/sayi2;
  printf("\n%.2f/%.2f=%f\n\n\n",sayi1,sayi2,bolum); 
 
  bol++;
  }
  else  if(atoi(&secim)==4){
  system("cls");
  carp=sayi1*sayi2;
  printf("\n%.2f*%.2f=%f\n\n\n",sayi1,sayi2,carp);
 
  car++;
  } else if(atoi(&secim)==-1)
  break;
  else{
  system("cls");
  printf("\nPlease enter one of these options 1 2 3 4 or -1\n");

  }


 
  }


   printf("The number of\nAddition\t\t Multiplication\t\t Subtraction\t\t Division  \n");
   printf("%f \t\t %f \t\t %f \t\t %f",top,car,fak,bol); 

 
 
 
 
   
 
 
 
 
 

 
   return 0;



}