uni-m.cds-adv-prog/ex1.2/string_analyzer.cpp

#include <iostream>
using namespace std ;

#define MAX_STR_LENGTH 50

int main() {

	char str[MAX_STR_LENGTH];
	// set pointer to beginning of str
	char* ptr = &str[0];

	// get string from user
	std::cout << "Enter string (N < " << MAX_STR_LENGTH << ") :";
	std::cin.getline (str, MAX_STR_LENGTH);
	std::cout << std::endl;

	// loop while the pointer does not point to a null byte
	// move the pointer one position at the end of the loop
	unsigned int chars_capital = 0, chars_lower = 0, chars_digits = 0, chars_other = 0;
	while ( *ptr != 0 )
	{
		if ( *ptr >= 'A' && *ptr <= 'Z' )
		{
			++chars_capital;
		}
		else if ( *ptr >= 'a' && *ptr <= 'z' )
		{
			++chars_lower;
		}
		else if ( *ptr >= '0' && *ptr <= '9' )
		{
			++chars_digits;
		}
		else
		{
			++chars_other;
		}

		// move pointer one char further
		++ptr;
	}

	std::cout << chars_capital << " Uppercase" << std::endl;
	std::cout << chars_lower   << " Lowercase" << std::endl;
	std::cout << chars_digits  << " Digits"    << std::endl;
	std::cout << chars_other   << " Other"     << std::endl;

	return 0 ;
}