c program, pointers

Question

I'm making a program that takes a three-digit integer and splits it into two integers. 224 would become 220 and 4. 114 would become 110 and 4.

Basically, you do it with modulos. I wrote what I think should work and the compiler keeps saying that there is a missing parenthesis before the &big but any changes just make more errors happen.

#include <stdio.h>

void split_num(int complete, int *big, int *little){
     *little = complete%10;
     *big  = complete - *little;
     return;
}


int main()
{
    int complete, big, little;

    printf("Give an integer to split: \n");
    scanf("%d", &complete);

    void split_num(complete, &big, &little);
    printf("Num split into 2 is : %d and %d", big, little);

    return 0;
}

it looks like you don't want the word void before split_num when you call it in main. see what happens if you remove that — marnir
– marnir, Commented Oct 21, 2011 at 21:26
interested on the fix of this... still learning pointers my self. — John Riselvato
– John Riselvato, Commented Oct 21, 2011 at 21:27

Chris Walton · Accepted Answer · 2011-10-21 21:27:24Z

3

Take out the "void" in your call to split_num(). It's only used in the function declaration (to signify that it does not return a value), not in actual invocations of it.

answered Oct 21, 2011 at 21:27

Chris Walton

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Comments

cli_hlt · Accepted Answer · 2011-10-21 21:27:32Z

0

The line (in main())

void split_num(complete, &big, &little);

should read

split_num(complete, &big, &little);

answered Oct 21, 2011 at 21:27

cli_hlt

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Comments

Edwin Buck · Accepted Answer · 2011-10-21 21:27:36Z

0

remove the void in the line "void split_num". You don't specify return values (void) when just calling a method.

answered Oct 21, 2011 at 21:27

Edwin Buck

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Comments

user473895 · Accepted Answer · 2011-10-21 21:31:55Z

0

You have an error in the following line:

void split_num( complete, &big, &little );

Remove the void return type and invoke the function like so:

split_num( complete, &big, &little );

The return; statement in the split_num( ... ) function is also unnecessary.

answered Oct 21, 2011 at 21:31

user473895

2 Comments

Arthur Collé Over a year ago

can you give me an example of when a function would not be "void" and would need to return a number? thanks for telling me to remove the void i'm so happy it works!

user473895 Over a year ago

@Arthur What you are referring to is the function return type. When a function has a void return type it does not return anything. An example of a function that returns an integer would be int main() which returns zero if your C program executes successfully otherwise non-zero.

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