Help me to rewrite my code below in C++?

Joe Wilson

I mean I want to use cout and cin instead of printf and scanf by the way I want to ask user to choose the members(numbers) of set and the size of set then use my printsubset function.

This is my code:

#include < stdio.h>

#include < conio.h>

#define MAX 20

int set[MAX];

int flag[MAX];

void printsubset(int n)

{

int i;

printf("{");

for (i=0 ; i < n ; i++)

if (flag[i])

printf ("%d ",set[i]);

printf("}\n");

}

void subset(int n,int i)

{

if (i==n)

{

printsubset(n);

return;

}

flag[i]=1;

subset(n,i+1);

flag[i]=0;

subset(n,i+1);

}

main()

{

int n=4;

for (int i=0 ; i < n ; i++)

{

set[i]=i+1;

flag[i]=0;

}

subset(n,0);

getch();

}

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Vulpes12y ago
Try this:

#include
#include

using namespace std;

#define MAX 20

int set[MAX];

int flag[MAX];

void printsubset(int n)
{
int i;
printf("{ ");

for (i = 0 ; i < n ; i++)
if (flag[i])
cout << set[i] << " ";

cout << "}" << endl;
}

void subset(int n,int i)
{
if (i == n)
{
printsubset(n);
return;
}

flag[i] = 1;
subset(n, i + 1);
flag[i] = 0;
subset(n, i + 1);
}

int main()
{
int n;

do
{
cout << "How many numbers are to be added to the set (maximum 20) ? : ";
cin >> n;
}
while (n < 1 || n > 20);

cout << "Enter them" << endl;

for(int i = 0; i < n; i++)
{
cout << i + 1 << " : ";
cin >> set[i];
flag[i] = 0;
}

cout << endl;

subset(n, 0);
getch();

return 0;
}