Closure sample of clang and golang

main.c

/* Closure sample */

#include <stdio.h>

typedef int anyFunc(void);

static int doTimes(anyFunc anything, int n);

int main(void)
{
    int number1 = 0;

    int increment1(void)
    {
        return ++number1;
    }

    int number2 = 0;

    int increment2(void)
    {
        return ++number2;
    }

    printf("--- part1 ---\n");

    printf("number1: %d\n\n", number1);
    /* => 0 */

    increment1();
    printf("number1: %d\n\n", number1);
    /* => 1 */

    increment1();
    printf("number1: %d\n\n", number1);
    /* => 2 */

    increment1();
    printf("number1: %d\n\n", number1);
    /* => 3 */

    printf("\n");

    printf("--- part2 ---\n");

    printf("number2: %d\n\n", number2);
    /* => 0 */

    printf("doTimesResult: %d\n", doTimes(increment2, 1));
    printf("number2: %d\n\n", number2);
    /* => 1 */

    printf("doTimesResult: %d\n", doTimes(increment2, 3));
    printf("number2: %d\n\n", number2);
    /* => 4 */

    printf("doTimesResult: %d\n", doTimes(increment2, 5));
    printf("number2: %d\n\n", number2);
    /* => 9 */
    printf("\n");

    return 0;
}

static int doTimes(anyFunc* anything, int n)
{
    int i, lastNumber;

    for (i = 0; i < n; i++) {
        lastNumber = anything();
    }

    return lastNumber;
}

main.go

// Closure sample

package main

import "fmt"

type anyFunc func() int

func main() {
	fmt.Printf("--- part1 ---\n")
	increment1 := getIncrementFunc()

	fmt.Printf("number: %d\n\n", increment1())
	// => 1

	fmt.Printf("number: %d\n\n", increment1())
	// => 2

	fmt.Printf("number: %d\n\n", increment1())
	// => 3

	fmt.Printf("\n")

	fmt.Printf("--- part2 ---\n")
	increment2 := getIncrementFunc()

	fmt.Printf("doTimesResult: %d\n\n", doTimes(increment2, 1))
	// => 1

	fmt.Printf("doTimesResult: %d\n\n", doTimes(increment2, 3))
	// => 4

	fmt.Printf("doTimesResult: %d\n\n", doTimes(increment2, 5))
	// => 9
}

func getIncrementFunc() anyFunc {
	var number int

	return func() int {
		number++
		return number
	}
}

func doTimes(anything anyFunc, n int) int {
	var lastNumber int

	for i := 0; i < n; i++ {
		lastNumber = anything()
	}

	return lastNumber
}

main.c requires not LLVM clang but gcc.

main.c

$ gcc main.c
$ ./a.out
--- part1 ---
number1: 0

number1: 1

number1: 2

number1: 3


--- part2 ---
number2: 0

doTimesResult: 1
number2: 1

doTimesResult: 4
number2: 4

doTimesResult: 9
number2: 9

main.go

% go run main.go
--- part1 ---
number: 1

number: 2

number: 3


--- part2 ---
doTimesResult: 1

doTimesResult: 4

doTimesResult: 9