Basically, what i would like is if the two letters are attached together (NOT seperated) in the string, it will say good, if not the bad.
Example:
#include <iostream>
#include <string>
int main ()
{
string letters = "or";
string test = "The man went to the store.";
//here is the letters "or"are attatched together in this string, it will out "good" (just for debugging)
system("pause");
return 0;
}
Well you could do this
size_t pos = 0;
string sample = "The man went to the store.";
while ((pos = sample.find_first_of("o", pos)) != string::npos)
{
if (sample.find_first_of("r", pos) == pos + 1)
cout << "good";
}doesnt work..
Sorry I forgot to include a statement to increment the pos variable if it wasn't found. This is the code I used to test it and it works for me now.
#include <iostream>
#include <string>
using namespace std;
int main()
{
size_t pos = 0;
string sample = "The man went to the store.";
while ((pos = sample.find_first_of("o", pos)) != string::npos)
{
if (sample.find_first_of("r", pos) == pos + 1)
cout << "good";
pos++;
}
cin.get();
return 0;
}
Well you could do this
size_t pos = 0; string sample = "The man went to the store."; while ((pos = sample.find_first_of("o", pos)) != string::npos) { if (sample.find_first_of("r", pos) == pos + 1) cout << "good"; }
Why?
Wouldn't sample.find_first_of("or", pos) do it in one statement instead of adding another .find plus an increment?
from C++ Reference
size_t find_first_of ( const string& str, size_t pos = 0 ) const;
size_t find_first_of ( const char* s, size_t pos, size_t n ) const;
size_t find_first_of ( const char* s, size_t pos = 0 ) const;
size_t find_first_of ( char c, size_t pos = 0 ) const;
Find character in string
Searches the string for any of the characters that are part of either str, s or c, and returns the position of the first occurrence in the string.But Silly me find() has an overload for to search for an entire string within a string. It probably is faster to use than what I thought up.
from C++ Reference
size_t find_first_of ( const string& str, size_t pos = 0 ) const; size_t find_first_of ( const char* s, size_t pos, size_t n ) const; size_t find_first_of ( const char* s, size_t pos = 0 ) const; size_t find_first_of ( char c, size_t pos = 0 ) const; Find character in string Searches the string for any of the characters that are part of either str, s or c, and returns the position of the first occurrence in the string.But Silly me find() has an overload for to search for an entire string within a string. It probably is faster to use than what I thought up.
Didn't realize that about find_first_of, not having used it. Thanks for the clarification. I was certainly thinking there was a method like find that did exactly what was needed. And there it is! :)
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