win32 calculater

[spongebob]

Hi
I have written my first, basic, meaninglyfull program. I feel i have done everything to it, that i can do in its current state. I would really wish to transfrom it into a win32 apllication with buttons for numbers and a screen for the calcultor for the letters to come up. Could someone help me (not write the program for me - i am here to learn) here is the code if it helps:

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

main ()

{
int a;
int b;
int c;
int d;
int e;
int f;
int g;
int h;



printf("What would you like to do?\n1=Add\n2=Subtract\n3=Multiply\n4=Divide");
scanf("%d",&a);

 

if(a==1) 
{printf("What is the first number you would like to add?");
scanf("%d",&b);
printf("What is the second number you would like to add?");
scanf("%d",&c);
d=b+c ;
printf("Your number is %d",d);
scanf("%d");}


if(a==2)
{printf("What is the first number you would like to subtract?");
scanf("%d",&e);
printf("What is the second number you would like to subtract?");
scanf("%d",&f);
g=e-f;
printf("Your number is %d",g);
scanf("%d");}

if(a==3)
{printf("What is the first number you would like to multiply?");
scanf("%d",&e);
printf("What is the second number you would like to multiply?");
scanf("%d",&f);
g=e*f;
printf("Your number is %d",g);
scanf("%d");}

if(a==4)
{printf("What is the first number you would like to divide?");
scanf("%d",&e);
printf("What is the second number you would like to divide?");
scanf("%d",&f);
g=e/f;
printf("Your number is %d\n",g);
scanf("%d");}




return 0;
}

Thanks in advance!

[00Sven]

I feel i have done everything to it, that i can do in its current state.

What about square root or exponents? In math.h there is a sqrt() function for getting the square root and you can use a loop to do exponents.

main()

main() returns an integer.

int main(void)

You should use floats or doubles to do division. Otherwise the user cant get decimals.

[itsme86]

Here's another way to write your program using functions:

#include <stdio.h>

int func_add(int num1, int num2)      { return num1 + num2; }
int func_subtract(int num1, int num2) { return num1 - num2; }
int func_multiply(int num1, int num2) { return num1 * num2; }
int func_divide(int num1, int num2)   { return num1 / num2; }

int main(void)
{
  struct
  {
    char *name;
    int (*func)(int, int);
  } list[] = { { "Add", func_add }, { "Subtract", func_subtract },
               { "Multiply", func_multiply }, { "Divide", func_divide } };
  int num1, num2;
  int i;
  int choice;

  puts("What would you like to do?");
  for(i = 0;i < 4;++i)
    printf("%d=%s\n", i + 1, list[i].name);

  scanf("%d", &choice);

  if(choice >= 1 && choice <= 4)
  {
    choice--;
    printf("What is the first number you would like to %s? ",
      list[choice].name);
    fflush(stdout);
    scanf("%d", &num1);
    printf("What is the second number you would like to %s? ",
      list[choice].name);
    fflush(stdout);
    scanf("%d", &num2);
    printf("Your number is %d\n", list[choice].func(num1, num2));
  }

  return 0;
}

[johnchain]

First of all, instead of all the ifs, you can use a switch statement....

Anyways..to your question. I've never done what you are trying to accomplish in C without using graphics functions which was harder for me. My first calculator I wrote in Visual Basic, which looked pretty close to your code, yet in VB you can just draw the buttons out.