Thread: I'm confused..

you write all functions in main?why?

Try this:

Code:

#include <stdio.h>

int div( int x, int y );
int mult(int x, int y);
int subt(int x, int y);
int add(int x, int y);

int main()
{
    int num;
	printf( "What would you like to do?\n" );

	scanf( "%d", &num );
	if ( num == 1)
	{
        int x;
        int y;

        printf( "Please enter two numbers that you would like to divide" );
        scanf( "%d", &x );
        scanf( "%d", &y );
        printf( "The division of these two numbers is %d\n", div( x, y) );
        getchar();
    }

    if ( num == 2)
    {
        int x;
        int y;

        printf( "Please enter two numbers that you would like to multiply" );
        scanf( "%d", &x );
        scanf( "%d", &y );
        printf( "The product of these two numbers is %d\n", mult( x, y) );
        getchar();
    }

    if ( num == 3 )
    {
        int x;
        int y;

        printf( "Please enter two numbers that you would like to add" );
        scanf( "%d", &x );
        scanf( "%d", &y );
        printf( "The sum of these two numbers is %d\n", add( x, y) );
        getchar();
    }



    if ( num == 4 )
    {
        int x;
        int y;

        printf( "Please enter two numbers that you would like to subtract" );
        scanf( "%d", &x );
        scanf( "%d", &y );
        printf( "The difference of these two numbers is %d\n", subt( x, y) );
        getchar();
    }

    return 0;
}

int div( int x, int y )
{
    getchar();
    return x / y;
}

int mult(int x, int y)
{
    getchar();
    return x * y;
}

int subt(int x, int y)
{
    getchar();
    return x - y;
}

int add(int x, int y)
{
    getchar();
    return x + y;
}

Always, declare all your functions without forgetting any function before the main function, and always define your functions outside the main function.

study the code to understand more

God Luck.

Sorted it out with

Code:

#include <stdio.h>

int div ( int x, int y );
int mult ( int a, int b );
int add ( int c, int d );
int sub ( int e, int f );

int main()





{
int num;
	printf( "What would you like to do?\n\n1. Divide two numbers\n2. Multiply two numbers\n3. Add two numbers\n4. Subtract two numers\n" );

	scanf( "%d", &num );
	if ( num == 1) {

	int x;
	int y;

	printf( "Please enter two numbers that you would like to divide" );
	scanf( "%d", &x );
	scanf( "%d", &y );
	printf( "The division of these two numbers is %d\n", div ( x, y) );
	getchar();
}


	if ( num == 2) {

	int a;
	int b;

	printf( "Please enter two numbers that you would like to multiply" );
	scanf( "%d", &a );
	scanf( "%d", &b );
	printf( "The product of these two numbers is %d\n", mult ( a, b) );
	getchar();
}



	if ( num == 3 ) {

	int c;
	int d;

	printf( "Please enter two numbers that you would like to add" );
	scanf( "%d", &c );
	scanf( "%d", &d );
	printf( "The sum of these two numbers is %d\n", add ( c, d) );
	getchar();
}





	if ( num == 4 ) {

	int e;
	int f;

	printf( "Please enter two numbers that you would like to subtract" );
	scanf( "%d", &e );
	scanf( "%d", &f );
	printf( "The difference of these two numbers is %d\n", sub ( e, f ) );
	getchar();
	}
	return 0;
}

int div ( int x, int y )
{
	getchar();
	return x / y;
	
}

int mult ( int a, int b )
{
	getchar();
	return a * b;
	}
	
int add ( int c, int d )
{
	getchar();
	return c + d;
}

int sub (int e, int f )
{
	getchar();
	return e - f;
}

Thanks guys!