A simple calculator using C about conversion of Fahrenheit to Celsius, and vice versa

Good day! I tried to make a simple calculator using C for my first project about conversion between Fahrenheit to Celsius, and vice versa. But it's not working, can someone tell me what I miss?

Here's my code:

#include <stdio.h>

int main()
{
double temp, fahrenheit, celsius;
char answer[2];

printf("Type 'CF' if you want to convert from celsius to fahrenheit, and 'FC' if you want to convert from fahrenheit to celcius: ");
fgets(answer, 2, stdin);

fahrenheit = (temp * 1.8) + 32;
celsius = (temp - 32) * 0.5556;
if(answer == "CF"){
    printf("Type the temperature here: ");
    scanf("%lf", &temp);
    printf("Answer: %f", fahrenheit);
}
else if(answer == "FC"){
    printf("Type the temperature here: ");
    scanf("%lf", &temp);
    printf("Answer: %f", celsius);
}
return 0;

}

calculator