Question

How to check if the first-letter of a string is lowercase in C++

Answer 1

#include <iostream>

using namespace std;

bool IsLower(char ch);

int main()
{
	char s1[] = "C++ programming language";
	if (IsLower(s1[0]))
		cout << "first letter lowercase" << endl;
	else
		cout << "first letter not lowercase" << endl;


	char s2[] = "c++ programming language";
	if (IsLower(s2[0]))
		cout << "first letter lowercase" << endl;
	else
		cout << "first letter not lowercase" << endl;

	return 0;
}
bool IsLower(char ch)
{
	if (ch >= 'a' && ch <= 'z')
		return true;

	return false;
}


/*
run:

first letter not lowercase
first letter lowercase

*/

 

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