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#include <iostream>
#include <string>
using namespace std;
int main()
{
string stringOne("Hello World");
// comparing from a certain offset in stringOne
if (!stringOne.compare(1, stringOne.length() - 1, "ello World"))
cout << "comparing 'Hello world' from index 1"
" to 'ello World': ok\n";
// the number of characters to compare (2nd arg.)
// may exceed the number of available characters:
if (!stringOne.compare(1, string::npos, "ello World"))
cout << "comparing 'Hello world' from index 1"
" to 'ello World': ok\n";
// comparing from a certain offset in stringOne over a
// certain number of characters with a second C-string
// This fails, as 3 chars in stringOne starting at
// index 6 are compared with "World"
if (!stringOne.compare(6, 3, "World"))
cout <<
"comparing 'Hello World' from index 6 over"
" 3 positions to 'World and more': ok\n";
else
cout << "Unequal (sub)strings\n";
// This one will report a match, as only 5 characters are
// compared of the source and target strings
if (!stringOne.compare(6, 5, "World and more", 0, 5))
cout <<
"comparing 'Hello World' from index 6 over"
" 5 positions to 'World and more': ok\n";
else
cout << "Unequal (sub)strings\n";
}
/*
Generated output:
comparing 'Hello world' from index 1 to 'ello World': ok
comparing 'Hello world' from index 1 to 'ello World': ok
Unequal (sub)strings
comparing 'Hello World' from index 6 over 5 positions to
'World and more': ok
*/
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