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C++ Program to Convert a String from Lowercase to Uppercase

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robaa
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2022-11-26
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Write a C++ Program to Convert a String from Lowercase to Uppercase. Here’s simple C++ Program to Convert a String from Lowercase to Uppercase in C++ Programming Language.

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robaa
2022-11-26
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C++ Strings : 

String is a sequence of characters. char data type is used to represent one single character in C++. So if you want to use a string in your program then you can use an array of characters.

 
 

The declaration and definition of the string using an array of chars is similar to declaration and definition of an array of any other data type.

Any string ends with a terminating null character ‘\0’. An array definition in such a way should include null character ‘\0’ as the last element.

C++ provides following two types of string representations:

 
  • The C-style character string.
  • The string class type introduced with Standard C++.

The C-style character string originated within the C language and continues to be supported within C++. This string is actually a one-dimensional array of characters which is terminated by a null character ‘\0’. Thus a null-terminated string contains the characters that comprise the string followed by a null.

Here is source code of the C++ Program to Convert a String from Lowercase to Uppercase. The C++ program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.

SOURCE CODE : :

/*  C++ Program to Convert a String from Lowercase to Uppercase  */

#include<iostream>
#include<string.h>
using namespace std;

int main()
{
      char str[50],str1[50];
      int i;
      cout<<"\nEnter any String in Lowercase :: ";
      gets(str);

      strcpy(str1,str);

      for(i=0;i<=strlen(str);i++)
      {
            if(str[i]>=97 && str[i]<=122)
            {
            str[i]=str[i]-32;
            }
      }
      cout<<"\nThe String [ "<<str1<<" ] in Uppercase = [ "<<str<<" ]\n";

     return 0;
}

OUTPUT : :

/*  C++ Program to Convert a String from Lowercase to Uppercase  */

Enter any String in Lowercase :: codezclub

The String [ codezclub ] in Uppercase = [ CODEZCLUB ]

Process returned 0

Above is the source code for C++ Program to Convert a String from Lowercase to Uppercase which is successfully compiled and run on Windows System.The Output of the program is shown above .

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