[CodeEval] Roller Coaster

rollercoaster

#include<iostream>
#include<string>
#include<stdlib.h>

using namespace std;

int isLetter(int sasi);
//Tests to see if the character is a letter

int isUpper(int sasi);
//Returns 0 for capital letter, 1 for lower case


int main(){

	string str;
	

	while (getline(cin, str)){
		int cap = 1; // 1=upper case

		for (int i = 0; i < str.length(); i++){

			int sasi = str[i];

			if (isLetter(sasi) > 0){

				if (isUpper(sasi) != cap){

					if (isUpper(sasi) == 0){

						sasi -= 32;

					}

					else if (isUpper(sasi) == 1){

						sasi += 32;

					}

				}

				if (cap == 0)
					cap = 1;
				else
					cap = 0;

			}

			str[i] = sasi;
		}

		cout << str << endl;
	}

	system("pause");

	return 0;

}

int isLetter(int sasi){

	if ((sasi >= 65 && sasi <= 90) || (sasi >= 97 && sasi <= 122))
		return 1;
	else
		return 0;

}

int isUpper(int sasi){

	if (sasi >= 65 && sasi <= 90)
		return 1;

	else
		return 0;

}