unitConverter.c

#include <stdio.h>

main()
{
	printf("Units converter:\n\n");	
	printf("[k] Kilogram (kg)\n[p] Pounds (lbs)\n[o] Ounces(o)\n");
	
	char firstUnit = ' ';
	char secondUnit = ' ';
	
	float initialValue, convertedValue;
	
	printf("Select unit initial: ");
	scanf("%c", &firstUnit);
	printf("Select unit final: ");
	scanf(" %c", &secondUnit);
	
	printf("Enter value: ");
	scanf("%f", &initialValue);
	
	
	switch(firstUnit)
	{
		case 'k': 
			switch(secondUnit)
			{
				case 'k': convertedValue = initialValue; break;
				case 'p': convertedValue = initialValue * 2.20462; break;
				case 'o': convertedValue = initialValue * 35.274; break;
				default: printf("Invalid option selected. Re-run the program.");break;
			}
		break;
		case 'p': 
			switch(secondUnit)
			{
				case 'k': convertedValue = initialValue * 0.453592; break;
				case 'p': convertedValue = initialValue; break;
				case 'o': convertedValue = initialValue * 16; break;
				default: printf("Invalid option selected. Re-run the program.");break;
			}
		break;
		case 'o': 
			switch(secondUnit)
			{
				case 'k': convertedValue = initialValue * 0.0283495; break;
				case 'p': convertedValue = initialValue * 0.0625; break;
				case 'o': convertedValue = initialValue; break;
				default: printf("Invalid option selected. Re-run the program.");break;
			}
		break;
		default: printf("Invalid option selected. Re-run the program.");break;
	}
	
	printf("Result: %f",convertedValue);
	getch();
}