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  1. #include <algorithm>                                                            
  2. #include <iomanip>                                                              
  3. #include <ios>                                                                  
  4. #include <iostream>                                                             
  5. #include <string>                                                               
  6. #include <vector>                                                               
  7. #include <sstream>
  8.  
  9. using std::cin;     using std::setprecision;                                    
  10. using std::cout;    using std::string;                                          
  11. using std::endl;    using std::streamsize;                                      
  12. using std::sort;    using std::vector;
  13.  
  14. int main() {
  15.      vector<string> names;                                                       
  16.      vector<double> finals;                                                      
  17.      typedef vector<double>::size_type vec_sz;                                   
  18.      vec_sz sizeStud;                                                            
  19.      string name;                                                                
  20.      double sum, grade;                                                          
  21.      int counter;                                                                
  22.      std::istringstream cin("fred sally joe end-of-input 10 20 end-of-input 30 end-of-input");
  23.      cout<<"Please enter the student's names \"end-of-input\" to end:\t";        
  24.      while(cin>>name&&name!="end-of-input") {                                    
  25.          names.push_back(name);                                                  
  26.      }                                                                           
  27.      sizeStud = names.size();                                                    
  28.      if(sizeStud == 0) {                                                         
  29.          cout<<"No students entered! Please try again."<<endl;                   
  30.          return 1;                                                               
  31.      }                                                                           
  32.  
  33.      for(int i = 0; i < sizeStud; i++) {                                         
  34.          sum=0;                                                                                            
  35.          counter=0;                                                              
  36.          cout<<"Please enter the grades for "<<names[i]                          
  37.              <<" \"end-of-input\" to end:\t";                                    
  38.          while(cin>>grade) {                                                     
  39.              counter++;                                                          
  40.              sum+=grade;                                                         
  41.          }                                                                       
  42.          if(counter==0) {                                                        
  43.              cout<<"No grades entered! Please try again."<<endl;                 
  44.          }                                                                       
  45.          else {                                                                  
  46.              cout<<endl;                                                         
  47.              finals.push_back(sum/counter);                                      
  48.          }                                                                       
  49.      }                                                                           
  50.      for(int i =0 ; i < sizeStud; i++) {                                         
  51.          streamsize prec = cout.precision();                                     
  52.          cout<<names[i]<<"'s final:\t\t"<<setprecision(4)                        
  53.              <<finals[i]<<setprecision(prec)<<endl;                              
  54.      }                                                                           
  55.  
  56.      return 0;              
  57. }
Success #stdin #stdout 0s 3432KB
comments (?)
stdin 
Standard input is empty
stdout 
Please enter the student's names "end-of-input" to end:	Please enter the grades for fred "end-of-input" to end:	
Please enter the grades for sally "end-of-input" to end:	No grades entered! Please try again.
Please enter the grades for joe "end-of-input" to end:	No grades entered! Please try again.
fred's final:		15
sally's final:		1.719e-312
joe's final:		1.316e-312
https://ideone.com/QLpwMR
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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