Question

I’m just learning C typing and am wondering what’s wrong with the following example. When I try to compile it I get the error: “format ‘%i’ expects type int, but argument 2 has type ‘int(*)(int, int)’.

   #include <stdio.h>

int difference (int x, int y);
int sum(int x, int y);

main(){
    int differ = difference(10, 5);
    int thesum = sum(3, 4);
    printf("differnece: %i, sum: %i \n", differ, sum);
}

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

int difference (int x, int y){
    return x - y;
}

Answer 1

You used sum (a function) where you presumably intended thesum (an (int) variable).