Function overloading in C

add.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int addi(int a, int b) {
    return a + b;
}

char *adds(char *a, char *b) {
    char *res = malloc(strlen(a) + strlen(b) + 1);
    strcpy(res, a);
    strcat(res, b);
    return res;
}

#define add(a, b) _Generic(a, int: addi, char*: adds)(a, b)

int main(void) {
    int a = 1, b = 2;
    printf("%d\n", add(a, b)); // 3

    char *c = "hello ", *d = "world";
    printf("%s\n", add(c, d)); // hello world

    return 0;
}

@Fusion I'd say it's not github, but C community, as memory leaks is something to avoid even in examples that are this simple.

DAE notice the memory leak???????????????

OMG did you guys see the memory leak?!!

'a' gets evaluated twice

There is a memory leak. You allocate with malloc but you never free the allocated memory. You should fix that.

Who says C can't be high-level and beautiful? <3