How to use an array index as an operator?

Question

How to use an array index as an operator?

Such that:

#include

main()
{
    char sign[]={\'+\',\'-\'};
    int a, b;
    a = 12 sign[1] 10         


        

Answer 1

If you are not strictly dependent on the infix notation, you'll be able to make it simply by

int plus(int x, int y)
{
    return x + y;
}

int minus(int x, int y)
{
    return x + y;
}

int (*)(int, int) sign[]={plus, minus};

and you'll be able to use that as:

int a = sign[1](10, 12);