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  1. #include <algorithm>
  2. #include <string>
  3. #include <map>
  4. #include <iostream>
  5.  
  6. std::map<std::string, float> marks ={{"Joe", 90}, {"Jim", 85}};
  7.  
  8. float getAverageMark() 
  9. { 
  10. 	if ( marks.empty()) 
  11. 	    return 0; 
  12. 	return std::accumulate(marks.begin(), marks.end(), 0.0f, [&](float f, auto&pr) 
  13. 	{ return f + pr.second;}) / marks.size();
  14. }
  15.  
  16. int main() 
  17. {
  18. 	std::cout << getAverageMark();
  19. }
Success #stdin #stdout 0s 3472KB
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stdin
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Standard input is empty
stdout
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87.5
https://ideone.com/HxIuNq
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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