iswupper() function in C++

C++ iswupper() function with Example: Here, we are going to learn about the iswupper() function of cwtype.h header file with example.
Submitted by Raja Sethupathi V, on February 01, 2019

The iswupper() function is defined in the header file <cwctype.h>.

Prototype:

    int iswupper(wchar_t rs);

Parameter:

wchar_t rs – Checks the given character is in upper case or not.

Return type:

The function returns two values:

Zero: if rs is non - uppercase character.
Non Zero: if rs is uppercase character.

Use of function

The iswupper() is built-in function in C++, which is used to check the given character, rs is in uppercase or not .

Program 1:

#include <cwctype> 
#include <iostream> 
using namespace std; 

int main() {   
	wchar_t rs1 = 'H'; 
	wchar_t rs2 = 'e'; 
	wchar_t rs3 = 'l';
	wchar_t rs4 = 'P';

	// Function to check if the character 
	// is a uppercase character or not 
	if (iswupper(rs1)) 
		wcout << rs1 << " is a uppercase "; 
	else
		wcout << rs1 << " is not a uppercase "; 
	wcout << endl; 

	if (iswupper(rs2)) 
		wcout << rs2 << " is a uppercase "; 
	else
		wcout << rs2 << " is not a uppercase "; 
	wcout << endl; 
	
	if (iswupper(rs3)) 
		wcout << rs3 << " is a uppercase "; 
	else
		wcout << rs3 << " is not a uppercase  "; 
	wcout << endl; 
	
	if (iswupper(rs4)) 
		wcout << rs4 << " is a uppercase  "; 
	else
		wcout << rs4 << " is not a uppercase  "; 
	wcout << endl; 

	return 0; 
}

Output

H is a uppercase 
e is not a uppercase 
l is not a uppercase  
P is a uppercase

Program 2:

#include <cwctype> 
#include <iostream> 
using namespace std; 

int main() {   
	wchar_t rs1 = '.'; 
	wchar_t rs2 = 'C'; 
	wchar_t rs3 = '@';
	wchar_t rs4 = 'M';

	// Function to check if the character 
	// is a uppercase character or not 
	if (iswupper(rs1)) 
		wcout << rs1 << " is a uppercase "; 
	else
		wcout << rs1 << " is not a uppercase "; 
	wcout << endl; 

	if (iswupper(rs2)) 
		wcout << rs2 << " is a uppercase "; 
	else
		wcout << rs2 << " is not a uppercase "; 
	wcout << endl; 
	
	if (iswupper(rs3)) 
		wcout << rs3 << " is a uppercase "; 
	else
		wcout << rs3 << " is not a uppercase  "; 
	wcout << endl; 
	
	if (iswupper(rs4)) 
		wcout << rs4 << " is a uppercase  "; 
	else
		wcout << rs4 << " is not a uppercase  "; 
	wcout << endl; 

	return 0; 
}

Output

. is not a uppercase 
C is a uppercase 
@ is not a uppercase  
M is a uppercase