/* June 4, 1998 */
/* program to convert temperature to fahrenhiet or celsius */

#include 
main ()
{
	/* declaration */
	char temp_type;
	float temp, fahren, celsius;

	/* user's input */
	printf("Enter the temperature to be converted: ");
	scanf("%f", &temp);

	/* select c or f for celsius and fahrenhiet respectively */
	printf("Enter an f if the temperature is in Fahrenhiet");
	printf("\n or a c if the temperature is in Celsius: ");
	scanf("\n%c",&temp_type);

	/* if statement to determine type of conversion */
	if (temp_type == 'f' || temp_type =='F')
	{
		celsius = (5.0 / 9.0) * (temp - 32.0);
		printf("\nThe equivalent Celsius temperature is %6.2f \n", celsius);
	}
	else
	{
		fahren = (9.0 / 5.0) * temp + 32.0;
		printf("\nThe equivalent Fahrenheit temperature is %6.2f \n", fahren);
	}
}

    Source: geocities.com/yosemite/rapids/9568

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