Inputing variable into string.find

[gregarion]

Hey guys, could i check with something What i would like to do is to be able to input a number and using that number as the index , it will start finding where a certain line is (in this case yht) from there. for example

int main ()
{
string s("abcdefghijleeeeeeeyhtpr") ;

string::size_type loc2 = s.find( "yht" , 0 ) ;

cout << loc2 << endl ;

the input will be 18 , as it starts counting from the start of the string. What i would like to know is, am i able to set a variable in the find syntax? instead of putting 0 , can i declare a variable and then can the sting.find() read it? So , if i were to input in 3 , how can i declare this and then put it into the find statement? Hope for some help. thanks

[CPallini]

I I'm missing something or you are asking for (I cannot believe it...)

string::size_type s = 3;
s.find( "yht" , s ):

? :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

[gregarion]

Sorry, what i meant is this

int main ()
{
string s("abcdefghijleeeeeeeyhtpr") ;

int now = 6 ;
int nowe = 3 ;

int result = nowe - now ;

string::size_type f = result ;
string::size_type loc2 = s.find( "yht" , f ) ;

cout << loc2 << endl ;
cout << f << endl ;

when i tried running this , i got the result displaying (4294967295 ). why is this? are we not allowed to use the variable (result) and put it to size_type f = result? is it not the same as size_type f = 3?

[David Crow]

gregarion wrote:

What i would like to do is to be able to input a number and using that number as the index

What about:

int index;
cin >> index;
string::size_type loc2 = s.find("yht", index);

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Man who follows car will be exhausted." - Confucius

[CPallini]

well, nowe-now is -3, then cast it to unsigned... :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

[David Crow]

gregarion wrote:

when i tried running this , i got the result displaying (4294967295 ). why is this?

Perhaps because f (and result) is -3.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Man who follows car will be exhausted." - Confucius

[gregarion]

Thanks guys, i got it. the issue was i thought that the output will start counting from the index i told it to. it only searches starting on the index, but output will be based from counting from the start of the file. Thanks!