Page 181 - C-Language

return 0;
}

Returning Function Pointers from a Function

#include <stdio.h>

enum Op
{
ADD = '+',
SUB = '-',
};

/* add: add a and b, return result */
int add(int a, int b)
{
return a + b;
}

/* sub: subtract b from a, return result */
int sub(int a, int b)
{
return a - b;
}

/* getmath: return the appropriate math function */
int (*getmath(enum Op op))(int,int)
{
switch (op)
{
case ADD:
return &add;
case SUB:
return ⊂
default:
return NULL;
}
}

int main(void)
{
int a, b, c;
int (*fp)(int,int);

fp = getmath(ADD);

a = 1, b = 2;
c = (*fp)(a, b);
printf("%d + %d = %d\n", a, b, c);
return 0;
}

Best Practices

Using typedef

https://riptutorial.com/ 157