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“Get next”/for iterator in C++

std::map<string, int> m;
std::map<string, int>::iterator it;
m["Fred"] = 5;
m["Bob"] = 3;
for (it = m.begin(); it != m.end(); ++it)
{
std::cout << it->first << “:” << it->second << std::endl;
}

Notes:

C++ map elements are returned sorted. The sorting function is a template parameter. It's part of the container's data type.

Contrast this with Perl, where the keys must be manually sorted.

“Get next”/for iterator in C++

std::map<string, int> m;

std::map<string, int>::iterator it;

m["Fred"] = 5;

m["Bob"] = 3;

for (it = m.begin(); it != m.end(); ++it)

{

std::cout << it->first << “:” << it->second << std::endl;

}

Notes: