/*
   teststr1.cpp
   CIS 150
   6/7/2005
   David Klick
  
   Demonstration of C-style string functions.
*/

#include <iostream>
#include <cstring>
using std::cin;
using std::cout;
using std::boolalpha;

void cont();

int main() {
   // create various strings
   char str1[] = "My string";
   char str2[] = "My string";
   char str3[] = "my string";
   char str4[] = "Your string";
   
   // display strings to user
   cout << "str1: " << str1 << '\n';
   cout << "str2: " << str2 << '\n';
   cout << "str3: " << str3 << '\n';
   cout << "str4: " << str4 << '\n';
   
   // demonstrate use of equality operator
   cout << boolalpha;
   cout << "str1 == str2 is " << (str1==str2) << '\n';
   cout << "str1 == str3 is " << (str1==str3) << '\n';
   cout << "str1 == str4 is " << (str1==str4) << '\n';
   
   // now use strcmp(char*, char*) function
   //    (case sensitive comparison)
   cout << "For strcmp(a, b) and stricmp(a, b):\n"
        << "   a result < 0 means a < b\n"
        << "   a result > 0 means a > b\n"
        << "   a result == 0 means a == b\n";
   cout << "strcmp(str1, str2) is " << strcmp(str1, str2) << '\n';
   cout << "strcmp(str1, str3) is " << strcmp(str1, str3) << '\n';
   cout << "strcmp(str1, str4) is " << strcmp(str1, str4) << '\n';
   
   // now use stricmp(char*, char*) function
   //    (case insensitive comparison)
   cout << "stricmp(str1, str2) is " << stricmp(str1, str2) << '\n';
   cout << "stricmp(str1, str3) is " << stricmp(str1, str3) << '\n';
   cout << "stricmp(str1, str4) is " << stricmp(str1, str4) << '\n';
   
   // demonstrate strlen(char*) function
   cout << "The length of str1 is " << strlen(str1) << '\n';
   cout << "The length of str2 is " << strlen(str2) << '\n';
   cout << "The length of str3 is " << strlen(str3) << '\n';
   cout << "The length of str4 is " << strlen(str4) << '\n';
      
   cont();
   return 0;
}

void cont() {
   if (cin.rdbuf()->sungetc() != -1 && cin.get() != '\n') cin.ignore(80,'\n');
   cout << "Press enter to continue...";
   cin.get();
}

/*
   Sample output:
   
   str1: My string
   str2: My string
   str3: my string
   str4: Your string
   str1 == str2 is false
   str1 == str3 is false
   str1 == str4 is false
   For strcmp(a, b) and stricmp(a, b):
      a result < 0 means a < b
      a result > 0 means a > b
      a result == 0 means a == b
   strcmp(str1, str2) is 0
   strcmp(str1, str3) is -1
   strcmp(str1, str4) is -1
   stricmp(str1, str2) is 0
   stricmp(str1, str3) is 0
   stricmp(str1, str4) is -1
   The length of str1 is 9
   The length of str2 is 9
   The length of str3 is 9
   The length of str4 is 11
*/