Getting first value from map in C

Question

I m using map in C     Suppose I have 10 values in the map and I want only the first one  How do I get it   Thanks

User · Answer

my map begin     See e g  http   cplusplus com reference stl map begin

User · Answer

begin   returns the first pair   precisely  an iterator to the first pair  and you can access the key value as - gt first and - gt second of that iterator

User · Answer

You can use the iterator that is returned by the begin   method of the map template   std  map lt K V gt  myMap  std  pair lt K V gt  firstEntry    myMap begin     But remember that the std  map container stores its content in an ordered way  So the first entry is not always the first entry that has been added

User · Answer

As simple as   your map begin  - gt first    key your map begin  - gt second    value

User · Answer

A map will not keep insertion order  Use   myMap begin    to get the value of the first pair  the one with the smallest key when ordered    You could also do myMap begin  - gt first to get the key and myMap begin  - gt second to get the value

[c++] Getting first value from map in C++

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