Combination of Strings

String_Combination.c

#include <iostream>
#include <cstring>
#include<cstdio>
using namespace std;
void swap(char*,char*);
void combo(char *, int, int);
void combo(char*);
int main()
{
    char ch[100];
    cout<<"Enter a string:  ";
    cin.getline(ch,100);
    cout<<endl<<"The possible combinations are:  "<<endl;
    combo(ch);
    return 0;
}


void swap(char* a, char* b)
{
    char temp = *a;
    *a = *b;
    *b = temp;
}



void combo(char  *word, int n, int l)
{
    if (n == l - 1)
        cout << word << endl;
    else
    {
        for (int i = n; i < l; i++)
        {
            swap((word+n), (word+i));
            combo(word, n + 1, l);
            swap((word+n), (word+i));
        }
    }
}

void combo(char *p)
{   int l=strlen(p); char *str; str=new char[l+1]; strcpy(str,p);
    l = strlen(str);
    int pos = 0;
    combo(str, pos, l);
}