Question

write a c++ program to reverse a string​

Answer 1

Answer:

#include<iostream>

#include<string.h>

using namespace std;

int main ()

{

   char str[50], temp;

   int i, j;

   cout << "Enter a string : ";

   gets(str);

   j = strlen(str) - 1;

   for (i = 0; i < j; i++,j--)

   {

       temp = str[i];

       str[i] = str[j];

       str[j] = temp;

   }

   cout << "\nReverse string : " << str;

   return 0;

}

Program Explanation

1. The user is asked to enter a string and it is stored in the character variable ‘str’.

2. The length of ‘str’ is stored in the variable ‘j’ and ‘i’ is initialized as 0.

3. Using a for loop, the string is reversed.

4. The ith character of str is swapped with jth character using a temporary variable ‘temp’.

5. The loop terminates when i is less than j.

6. str is then printed which is th result.

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