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  1. #include <iostream>
  2. #include <map>
  3.  
  4. typedef std::map<std::string,double> Map;
  5. typedef Map::iterator Mapit;
  6.  
  7. int main()
  8. {
  9.     Map m;
  10.     Mapit i;
  11.  
  12.     m["test"]=0.4;
  13.     m["test2"]=-2.4;
  14.  
  15.     for(i = m.begin(); i != m.end(); ++i)
  16.     std::cout << i->first << "=" << i->second << '\n';
  17.  
  18.     m["test2"]=99.9;
  19.  
  20.     for(i = m.begin(); i != m.end(); ++i)
  21.     std::cout << i->first << "=" << i->second << '\n';
  22.  
  23.     m["test2"]+=99.9;
  24.  
  25.     for(i = m.begin(); i != m.end(); ++i)
  26.     std::cout << i->first << "=" << i->second << '\n';
  27.  
  28.     m["test3"]+=12.34;
  29.  
  30.     for(i = m.begin(); i != m.end(); ++i)
  31.     std::cout << i->first << "=" << i->second << '\n';
  32. }
Success #stdin #stdout 0s 2868KB
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stdin
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Standard input is empty
stdout
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test=0.4
test2=-2.4
test=0.4
test2=99.9
test=0.4
test2=199.8
test=0.4
test2=199.8
test3=12.34
https://ideone.com/CLzqUT
language:
C++ 4.3.2 (gcc-4.3.2)
created:
12 years ago
visibility:
public

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