Question

Write a program to input a string in mixed case and display all the uppercase charaters in lowercase and vice versa

Answer 1

Take one string of any length and calculate its length.

Scan string character by character and keep checking  the index .

If character in a index is in lower case, then subtract 32 to convert it in upper case, else add 32 to convert it in upper case

Print the final string.

// CPP program to Convert characters  

// of a string to opposite case

#include<iostream>

using namespace std;

 

// Function to convert characters  

// of a string to opposite case

void convertOpposite(string &str)

{

   int ln = str.length();

     

   // Conversion according to ASCII values

   for (int i=0; i<ln; i++)

   {

       if (str[i]>='a' && str[i]<='z')

       //Convert lowercase to uppercase

           str[i] = str[i] - 32;

       else if(str[i]>='A' && str[i]<='Z')

       //Convert uppercase to lowercase

           str[i] = str[i] + 32;

   }

}

 

// Driver function

int main()

{

   string str = "GeEkSfOrGeEkS";

     

   // Calling the Function

   convertOpposite(str);

     

   cout << str;

   return 0;

}

[i hope ti helps you]