Thread: switch problem

my code seems to not return any of the case statements other than default, when i enter in a number larger than zero... and im not sure why...

help please?

Code:

#include <stdio.h>

int ResColour(int colour);

int main(void)
{

	int input;
	int rc;
	int colour;

	printf("Please enter a resistor value in ohms:\n");

	rc = scanf("%d",&input);

	if(rc!=1)
		printf("Please enter a valid resistor value!\n");
	else if(input==0)
		printf("Please enter a valid resistor value!\n");
	else if(input < 0)
		printf("Please enter a valud resistor value!\n");
	else if(input > 0)
	{
		
			printf("The colour code for resistor value %d is:\n",input);
			ResColour(colour);
		
	}

	printf("\n\n");

	return(0);
}

int ResColour(int colour)
{
	

	switch(colour)
	{
		case 0: printf( " black");
				break;
		case 1: printf( " brown");
				break;
		case 2: printf( " red");
				break;
		case 3: printf( " orange");
				break;
		case 4: printf( " yellow");
				break;
		case 5: printf( " green");
				break;
		case 6: printf( " blue");
				break;
		case 7: printf( " violet");
				break;
		case 8: printf( " grey");
				break;
		case 9: printf( " white");
				break;
		default: printf( " unknown digit detected");

		return(colour);
	}
}