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//Ronan Sullivan
//C-Strings
#include<iostream>
#include<cstring>
using namespace std;
//Declaration of Prototypes
int lastIndexOf(char *s, char);
void reverse(char *s);
int replace(char *s, char target, char replacementChar);
int findSubstring(char *s, char substring[]);
bool isPalindrome(char *s);
void WordReverser(char *s, int, int);
void reverseWords(char *s);
int main()
{
const int MAX_SIZE = 300;
int IndexOf;
char s[MAX_SIZE];
char filler[2];
char temp;
char charTarget;
cout << "Please enter in your string.\n";
cin.getline(s, MAX_SIZE);
cout << "\nNext, enter your target character.\n";
cin >> charTarget;
cin.getline(filler, 2);
IndexOf = lastIndexOf(s, charTarget);
cout << IndexOf << endl;
cout << "Please enter a string you would like to reverse\n";
cin.getline(s, MAX_SIZE);
reverse(s);
cout << "Please enter an array you'd like to replace a letter of.\n"
cin.getline(s, MAX_SIZE);
char letter, letter2;
cout << "\nPlease enter a letter you would like to replace.\n";
cin>> letter;
cin.getline(filler, 2);
cout << "\nPlease enter a letter you would like to place.\n";
cin>> letter2;
cin.getline(filler, 2);
replace(s, letter, letter2);
cout << "\nPlease enter a new string, with a substring you'd like to find.\n";
cin.getline(s, MAX_SIZE);
cout << "\nPlease enter a substring which you would like to find.\n";
char substring[30];
cin.getline(substring, 30);
int place;
place = findSubstring(s, substring);
cout << "Your substring starts at "<< place << endl;
cout << "Please enter a string that might be a Palindrome.\n";
cin.getline(s, MAX_SIZE);
if(isPalindrome(s))
cout<< "It's a palindrome!\n";
else
cout<<"It's not a palindrome...\n";
cout<< "Please enter a string whose words you would like to reverse.\n";
cin.getline(s, MAX_SIZE);
reverseWords(s);
cout << s;
return 0;
}
int lastIndexOf(char *s, char target)
{
int counter = 0;
for (int i = 0; i < strlen(s); ++i)
{
if (s[i] == target)
counter = i;
}
if (counter == 0)
return -1;
return counter;
}
void reverse(char *s)
{
int temp;
char temp2;
temp = (strlen(s) - 1);
for (int i = 0; i < (strlen(s) / 2.0); ++i)
{
temp2 = s[i];
s[i] = s[temp];
s[temp] = temp2;
temp--;
}cout << s << endl;
}
int replace(char *s, char target, char replacementChar)
{
int counter;
for (int i = 0; i < strlen(s); ++i)
{
if (s[i] == target)
s[i] = replacementChar;
counter++;
}
cout<< s;
return counter;
}
int findSubstring(char *s, char substring[])
{
int counter = 0;
int temp;
int j = 0;
for (int i = 0; i < strlen(s); ++i)
{
if(s[i] == substring[j])
{
for (j = 0; j < strlen(substring); ++j)
{
cout << s[i+j] << " " << substring[j] << endl;
if (s[i + j] == substring[j])
{
counter++;
cout << counter << endl;
temp = i;
}
if (counter == strlen(substring))
return i;
}
}
}
return -1;
}
bool isPalindrome(char *s)
{
int temp = strlen(s) - 1;
int counter = 0;
for (int i = 0; i < (strlen(s)); ++i)
{ if (s[i] == s[temp])
{
counter++;
}
temp--;
}
if (counter == strlen(s))
return true;
else
return false;
}
void reverseWords(char *s)
{
reverse(s);
for (int i = 0; i < strlen(s); ++i)
{
for (int j = 0; j < strlen(s) +1; ++j)
{
if (s[j] == ' ' || s[j] == '\0')
{WordReverser(s, i, j);
i = j + 1;
}
}
}
}
void WordReverser(char *s, int i, int j)
{
int temp;
char temp2;
temp = j;
for (; i < j; ++i)
{
temp2 = s[j];
s[j] = s[i];
s[i] = temp2;
j--;
}
}
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