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letters.c
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/****************************************************************************
* letters.c
* Computer Science 50
* Nataliia Vynogradenko
*
* Printing letters with different cases
***************************************************************************/
#include <stdio.h>
#include <cs50.h>
#include <string.h>
int main(void)
{
// ask user for phrase
bool userInputIsCorrect = false;
string phrase = "";
do
{
printf("Print any message using lovercase letters:\n");
phrase = GetString();
for (int i = 0; i < strlen(phrase) ; i++)
{
if (!CurrentCharIsInLowercase(phrase[i]))
{
break;
}
else
{
userInputIsCorrect = true;
}
}
}
while (!userInputIsCorrect);
for (int i = 0; i < strlen(phrase) ; i++)
{
if (CurrentCharIsInLowerCase(phrase[i]) && i%2 == 0)
{
printf("%c", phrase[i] - 32);
}
else
{
printf("%c", phrase[i]);
}
}
printf("\n");
// check every letters blah blah
return 0;
}
bool CurrentCharIsInLowercase(char currentCharacter)
{
return currentCharacter >= 97 && currentCharacter <= 122;
}