Use the auto keyword in C++ STL

user_466534 0
Viewed 208780

I have seen code which use vector,

vector<int>s;
s.push_back(11);
s.push_back(22);
s.push_back(33);
s.push_back(55);
for (vector<int>::iterator it = s.begin(); it!=s.end(); it++) {
    cout << *it << endl;
}

It is same as

for (auto it = s.begin(); it != s.end(); it++) {
    cout << *it << endl;
}

How safe is in this case the use of the auto keyword? And what about if type of vector is float? string?

c++11 stl c++
5 Answers

If you want a code that is readable by all programmers (c++, java, and others) use the original old form instead of cryptographic new features

atp::ta::DataDrawArrayInfo* ddai;
for(size_t i = 0; i < m_dataDraw->m_dataDrawArrayInfoList.size(); i++) {
    ddai = m_dataDraw->m_dataDrawArrayInfoList[i];
    //...
}
user_113106890
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