C + + Primer plus Sixth Edition programming exercise---Chapter 6th branching and logical operators

1.

1#include <iostream>2#include <string>3#include <cctype>4 5 intMain ()6 {7STD::stringInputstr;8std::cout<<"Enter your character list. Enter @ to end."<<Std::endl;9     Charch;TenSTD::stringSrcstr; OneSTD::stringDststr; A      while(Std::cin.Get(CH)) -     { -         if(ch = ='@') the         { -Std::cout <<"input befor exchane:"<< Srcstr <<Std::endl; -Std::cout <<"input after Exchane:"<< Dststr <<Std::endl; -              Break; +         } -Srcstr = Srcstr +ch; +         if(Islower (CH)) A         { atDststr = Dststr +Char(ToUpper (CH)); -             Continue;//there must be continue, otherwise it's all lowercase. -         } -         if(Isupper (CH)) -         { -Dststr = Dststr +Char(ToLower (CH)); in             Continue; -         } toDSTSTR = dststr + ch;//other characters are displayed as-is +     } -     return 0; the}

2.

1#include <iostream>2#include <array>3 4 intMain ()5 {6     Const intSize =Ten;7std::array<Double,size>donation;8     Doublesum =0.0;9     DoubleAvrgvalue =0.0;Ten     intCountlager =0; One     intEnternum =0; Astd::cout<<"pleas enter up and double value, non-digital to exit."<<Std::endl; -      while((Enternum < size) && (std::cin>>Donation[enternum])) -     { theSum + =Donation[enternum]; -enternum++; -     } -Avrgvalue = sum/Enternum; +      for(intI=0; i<enternum;i++) -     { +         if(Donation[i] >avrgvalue) A         { atcountlager++; -         } -     } -  -std::cout<<"there has"<< Countlager <<"larger than Everage."<<Std::endl; -  in     return 0; -}

3.

1#include <iostream>2#include <string>3 4 voiduseage ()5 {6std::cout<<"Please enter one of the following choices:"<<Std::endl;7std::cout<<"c) carnivore\t"<<"p) Pianist"<<Std::endl;8std::cout<<"t) tree\t\t"<<"g) Game"<<Std::endl;9 }Ten  One voidtip () A { -std::cout<<"Please enter a C, p, t or G:"; - } the intMain () - { - useage (); -     Charch; +      while(true) -     { +Std::cin>>ch; A         if(ch! ='C'&& ch! ='P'&& ch! ='T'&& ch! ='g') at         { - tip (); -             Continue; -         } -         if(ch = ='C') -         { instd::cout<<"a Tager is a carnivore."<<Std::endl; -             Continue; to         } +         if(ch = ='P') -         { thestd::cout<<"Beethoven is a pianist."<<Std::endl; *             Continue; $         }Panax Notoginseng         if(ch = ='T') -         { thestd::cout<<"a maple is a tree."<<Std::endl; +             Continue; A         } the         if(ch = ='g') +         { -std::cout<<"Chess is a game."<<Std::endl; $             Continue; $         } -     } -     return 0; the}

C + + Primer plus Sixth Edition programming exercise---Chapter 6th branching and logical operators