Re: STL Map Problem
On 3/30/2013 6:24 PM, Mike Copeland wrote:
I am developing a small (and seemingly simple) STL map application,
yet I can't get a clean compile. Below is code that produces a compiler
error on the "find" call, where the compiler doesn't accept the
assignment operator for the iterator. Please advise. TIA
map<string, int> convMap;
map<string, int>::iterator kIter;
string str = "Oops";
convMap[str] = 17;
kIter = convMap.find(str) != convMap.end(); // <== error!
You're trying to assign the boolean to the iterator. Why? Your
expression is evaluated this way:
kIter = (convMap.find(str) != convMap.end())
(since the inequality operator has precedence over assignment). Did you
mean to assign first, like
(kIter = convMap.find(str))
and then compare it? Why compare it if you aren't going to use the
result of the comparison? Could it be that you need to remove
everything starting with "!=" and until the semicolon (excluding it)?
if(kIter != convMap.end())
int ppp = kIter->second;
else // not found
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