Finch/examples/c_import.fn

// Use any C library: import its header and call it.
import "stdio.h"
import "math.h"
import "stdlib.h"
import "string.h"

fn main() {
    printf("printf works: %d + %d = %d\n", 2, 3, 2 + 3)
    puts("so does puts")

    print("sqrt(2) =", sqrt(2))
    print("pi from math.h:", M_PI)
    print("strlen(\"finch\") =", strlen("finch"))
    print("RAND_MAX =", RAND_MAX, "EOF =", EOF)

    // memory from C: malloc gives a ptr, free gives it back
    ptr[i32] n = malloc(4)
    n.value = 7
    print("from the heap:", n.value)
    free(n)

    fprintf(stderr, "this goes to stderr\n")
}