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Another vector question

Posted on 2004-10-18
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Last Modified: 2010-04-01
I am  comparing a string from one vector to a string in another vector.  How would I go about comparing if the string from one vector to a string from the other vector if only the substring needs to match up with the other vector?
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Question by:jewee
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5 Comments
 
LVL 86

Accepted Solution

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jkr earned 2000 total points
ID: 12342193
That depends on whether you are using strings or char*. In the letter case, 'strstr()' will find if a substring matches, in the 1st case, 'string::find()' will do that.
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Author Comment

by:jewee
ID: 12342732
So, would i use iterators for both?

I need to compare strings from one vector to strings in another vector.  The size of the vectors are different.
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LVL 86

Expert Comment

by:jkr
ID: 12343403
Yes, if you have a

string str = "substring";
vector<string> vs;

for ( vector<string>::iterator i = vs.begin(); i != vs.end(); ++i) {

    if ( -1 != i->find(str)) {

        cout << "Found " << str->c_str() " in in " i->c_str() << endl;
    }
}
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Author Comment

by:jewee
ID: 12343417
But I have 2 vectors.  I'm comparing each element to elements in the other vector.
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LVL 86

Expert Comment

by:jkr
ID: 12343443
>>I'm comparing each element to elements in the other vector

Oh, then it might work without iterators - assuming that both vectors are of the same size:

vector<string> vs1;
vector<string> vs2;

for ( inti = 0; i != vs1.size(); ++i) {

   if ( -1 != vs1[i].find(vs2[i])) {

       cout << "Found " << vs2[i].c_str() " in in " vs1[i].c_str() << endl;
   }
}
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