md.cpp

#include <cstdio>
#include <stdlib.h>

void percabangan();
void perulangan();
void array_satu_dimensi();
void array_dua_dimensi();
void subroutine();
char ib[3];

int main(int argc, char *argv[], char *envp[])
{
	char buf[10];
	short int opt;

	while (1) {
		printf(
			"\ec\n"
			"===============================\n"
			"1. Percabangan\n"
			"2. Perulangan\n"
			"3. Array 1 Dimensi\n"
			"4. Array 2 Dimensi\n"
			"5. Sub Routine\n"
			"6. Exit program\n"
			"===============================\n"
			"Masukkan pilihan: "
		);

		#define a(A,B) case A: printf("\ec"); B(); break;

		fgets(buf, 8, stdin);
		opt = atoi(buf);
		switch (opt) {
			a(1,percabangan)
			a(2,perulangan)
			a(3,array_satu_dimensi)
			a(4,array_dua_dimensi)
			a(5,subroutine)
			case 6: return 0;
		}

		#undef a
	}
	return 0;
}

#define PAUSE \
	printf("Tekan enter untuk melanjutkan!\n"); \
	fgets(ib, 2, stdin);

void percabangan() {
	char buf[10];
	short int angka;
	printf("Masukkan angka: ");
	fgets(buf, 8, stdin);
	angka = atoi(buf);
	if (angka < 5) {
		printf("Angka kurang dari 5\n");
	} else if (angka == 5) {
		printf("Angka sama dengan 5\n");
	} else {
		printf("Angka lebih dari 5\n");
	}
	PAUSE
}

void perulangan() {
	int i;
	for (i = 0; i < 10; ++i)
		printf("Perulangan %d\n", i);
	PAUSE
}

void array_satu_dimensi() {
	int i, array[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
	for (i = 0; i < (sizeof(array)/sizeof(array[0])); i++)
		printf("array[%d] = %d\n", i, array[i]);
	PAUSE
}

void array_dua_dimensi() {
	int i, j, array[][3] = {
		{1, 2, 3},
		{4, 5, 6},
		{7, 8, 9}
	};
	for (i = 0; i < (sizeof(array)/sizeof(array[0])); i++) {
		for (int j = 0; j < (sizeof(array[0])/sizeof(array[0][0])); ++j)
			printf("array[%d][%d] = %d\n", i, j, array[i][j]);
	}
	PAUSE
}

void subroutine() {
	printf("Ini subroutine\n");
	PAUSE
}