C++ Code Review: Shows permutation of entered letters.

Description: This program shows all possible combination of entered letters.

Code:

//Compiling Tool: Code::Block IDE with MinGW

//Program shows how many words a entered sentence has.

 

#include<iostream>

#include<stdio.h>

#include<string.h>

 

using namespace std;

 

int main()

{

    char a[50],temp;

    int i,j,len;

    cout<<"Enter any string:\n";

    gets(a);

    len=strlen(a);

 

    cout<<"Reverse of the string is: ";

 

    for(i=0,j=len-1;i<len/2;++i,--j)

    {

        temp=a[i];

        a[i]=a[j];

        a[j]=temp;

    }

 

    cout<<a;

    return 0;

}           

 Output:

 

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