calculations with pointers

hey all, so im making one that uses pointers to pass the answers of four calculations. im just missing something here, i go to compile it and it freezes and closes the program. thanks for the help.

Code:

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

void calculation(double, double, double *, double *, double *, float *);

int main()
{
    double num1, num2;
   
    double *sum, *sub, *prod;
    float *div;
   
    float div_answer = 0;
    double sum_answer = 0;
    double sub_answer = 0;
    double prod_answer = 0;
   
                   
                      *sum = sum_answer;
                      *sub = sub_answer;
                      *div = div_answer;
                      *prod = prod_answer;       
                     
    printf("Please enter two numbers:");
    scanf("%f %f",&num1, &num2);
   
    calculation (num1, num2, &sum_answer, &sub_answer, &prod_answer, &div_answer);
   
                      printf("%d + %d = %d\n", num1, num2, sum_answer);
                      printf("%d - %d = %d\n", num1, num2, sub_answer);                     
                      printf("%d * %d = %d\n", num1, num2, prod_answer);   
                      printf("%d / %d = %f\n", num1, num2, div_answer);
   
    system("PAUSE");
  return 0;
}

 void calculation (double num1, double num2, double *sum, double *sub, double *prod, float *div)
      {         
                 
                  *sum = num1 + num2;
                 
                  *sub = num1 - num2;
               
                  *prod = num1 * num2;
             
                  *div = num1 / num2;
               
                  }

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Quote:

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Originally Posted by mackieinva

Code:

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                      *sum = sum_answer;
                      *sub = sub_answer;
                      *div = div_answer;
                      *prod = prod_answer;

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This is the problem. You are assigning values to random spots in memory, since the four pointers on the left-hand-side are all uninitialized. This entire block of code, as well as the sum, sub, div, and prod pointers, are all unnecessary. Just take it out.

ty for the help brewbuck, it helped make it click. i wasnt trying to be an ass myself calling you a dick before just hard to tell sarcasm and things like that over the internet. later.