[14] [C] How do we deal with large intermediate numbers?

I am writing #14 in C. However I am fidning it difficult to complete becuase of the insanely large intermediate numbers in the test data.

My programs works perfectly for any intermediate numbers below INT-MAX but this restraint is breaking my calculation for larger inputs.

How can I go about using large numbers?

I tried using doubles rather than ints as my main data type but could never get this to work properly. Is this one way of going about it?

My code so far:

#include <stdio.h>

#define FALSE 0
#define TRUE !FALSE

int main(){
    int workingResult;
    scanf(" %d", &workingResult);

    char operation;
    int newValue;
    int modFlag = FALSE;    // Defines whether modulus operation has been hit

    do{
        scanf(" %c %d", &operation, &newValue);

        switch(operation){

            case '+':
                workingResult += newValue;
                break;

            case '*':
                workingResult *= newValue;
                break;

            case '%':
                workingResult %= newValue;
                modFlag = TRUE;
                break;

            default :
                return 1; // Error 1: Invalid operator
        }

    } while(modFlag != TRUE);

    printf("%d", workingResult);

    return 0;
}

I'll give it a go. I'll have to pretty much rewrite the entire program to do that then I beleive. C is horrible for reading input. Thanks.

I got it done with your suggestion, thank you Ratenfutz.

It's actually a very simple procedure to do but C makes the job much harder than other languages becuase of dynamic memory allocation being necassary in this case and the fact that input is notoriously difficult in C.