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  1. #include <iostream>
  2. #include <vector>
  3. #include <cstdlib>
  4.  
  5. struct vector_t: public std::vector<int> {
  6. 	int&  operator [] (unsigned int i){
  7. 		if( this->size() <= i ){ this->resize(i+1); }
  8. 		return this->at(i);
  9. 	}
  10. };
  11.  
  12.  
  13. int main(){
  14. 	using namespace std;
  15.     vector_t t;
  16.     int cnt, ten, i;
  17.     double sum, avg;
  18.  
  19. 	cnt = 0;
  20. 	cin >> ten;
  21.  
  22. 	label_1:
  23.     if( ten != 999 ){
  24.         t[cnt] = ten;
  25.         cnt = cnt + 1;
  26. 	    cin >> ten;
  27. 		goto label_1;
  28.     }
  29. 	sum = 0;
  30. 	i = 0;
  31.  
  32. 	label_2:
  33. 	if( i < cnt ){
  34. 		sum = sum + t[i];
  35. 		i = i + 1;
  36. 		goto label_2;
  37. 	}
  38. 	avg = sum / cnt;
  39.  
  40. 	cout << avg << endl;
  41.  
  42. 	exit(0);
  43. }
Success #stdin #stdout 0s 3300KB
comments (?)
stdin 
999
stdout 
-nan
https://ideone.com/qmTOm7
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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