callback_function/pfunc.c at master · slim2580065056/callback_function · GitHub

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#include <stdio.h>

int add(int a, int b) { return a+b; }
int sub(int a, int b) { return a-b; }
int mul(int a, int b) { return a*b; }
int div(int a, int b) { return a/b; }

struct operations{
    int (*ADD)(int a, int b);
    int (*SUB)(int a, int b);
    int (*MUL)(int a, int b);
    int (*DIV)(int a, int b);
};

int main()
{
    int a=8,b=2,result;
    struct operations FUN;
    FUN.ADD = add;
    FUN.SUB = sub;
    FUN.MUL = mul;
    FUN.DIV = div;

    result = FUN.ADD(a,b);
    printf("result is %d\n\r",result);
    result = FUN.SUB(a,b);
    printf("result is %d\n\r",result);
    result = FUN.MUL(a,b);
    printf("result is %d\n\r",result);
    result = FUN.DIV(a,b);
    printf("result is %d\n\r",result);
	return 0;
}