#include <stdio.h>
#include <stdlib.h>
double Cel(double num1);
double Fah(double num2);

int main(void)
{
    int num1;
    double n1;
    printf("1.섭씨를 화씨로 2.화씨를 섭씨로\n");
    printf("선택>>");
    scanf("%d",&num1);
    if(num1==1)
    {        
               printf("섭씨입력:");
               scanf("%lf",&n1);
               printf("화씨:%lf",Cel(n1));
               }
    else if(num1==2)
    {   
         printf("화씨입력:");
         scanf("%lf",&n1);
         printf("섭씨:%lf",Fah(n1));
         }
    else
        printf("1하고 2만해\n");
       
               
              
    system("pause");
    return 0;
}
double Cel(double num1)
{
    return 1.8*num1+32;
}
double Fah(double num2)
{
    return (num2-32)/1.8;
}