#include <stdio.h>
#include <string.h>

float calcfah(float x)
{
        return (x * 9/5) + 32;
}

float calccel(float x)
{
        return (x - 32) * 5/9;
}


int main(void)
{
        char choice[2];
        float num = 0;
        while ( (strcasecmp("q", choice)) != 0 )
        {

                printf("1. Convert Fahrenheit to Celsius.\n");
                printf("2. Convert Celsius to Fahrenheit.\n");
                printf("Q to quit.\n");
                scanf("%s", &choice);

                if ((strcmp("1", choice)) == 0)
                {
                        printf("Please enter Fahrenheit number:");
                        scanf("%f", &num);
                        printf ("%g Degrees Celsius\n", calccel(num));

                }

                if ((strcmp("2", choice)) == 0)
                {
                        printf("Please enter Celsius number:");
                        scanf("%f", &num);
                        printf ("%g Degrees Fahrenheit\n", calcfah(num));

                }
                }
        return 0;
}