Reverse string case using pointer arithmetic : char pointer « Data Types « C++ Tutorial

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C++ Tutorial » Data Types » char pointer

2.21.1.Reverse string case using pointer arithmetic

#include <iostream> 

#include <cctype> 

using namespace std; 

 

int main() 

{ 

  char *p; 

  char str[80] = "This Is A Test"; 

 

  cout << "Original string: " << str << "\n"; 

 

  p = str; // assign p the address of the start of the array 

 

 

  while(*p) { 

    if(isupper(*p)) 

      *p = tolower(*p); 

    else if(islower(*p)) 

      *p = toupper(*p); 

    p++; 

  } 

 

  cout << "Inverted-case string: " << str; 

 

  return 0; 

}

Original string: This Is A Test
Inverted-case string: tHIS iS a tEST

2.21.char pointer
	2.21.1.	Reverse string case using pointer arithmetic
	2.21.2.	Printing the address stored in a char * variable
	2.21.3.	Display value of char , then display value of char static_cast to void
	2.21.4.	Converting lowercase letters to uppercase letters using a pointer
	2.21.5.	Printing a string one character at a time using a pointer

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