Reading fractions in C

Question

How do I read a fraction into C to do math with it? (The fraction will contain the slash symbol) For example, A user will input 3/12. (a string) The program will find the gc

Answer 1

Here's what I generally do.

int main()
{
double a,b=1.0f,s;
scanf("%lf/%lf",a,b);
s=a/b;
printf("%lf",s);
}

Even if the user the doesn't enter the value of variable b the value is already initialized to 1.0f so it can calculate it's value anyway.

This is tried on Ubuntu with GCC.