C ++ Primer Plus Chapter 1 question solution, primer Chapter 2

C ++ Primer Plus Chapter 1 question solution, primer Chapter 2

Chapter C ++ Primer Plus

# Include
 
  
Void PrintStr (char * str, int flag = 0); int main () {char str [] = "fuck"; std :: cout <"#1" <std: endl; PrintStr (str); std: cout <"#2" <std: endl; PrintStr (str, 1996); std: cout <"#3" <std: endl; PrintStr (str, 1996); std :: cout <"#4" <std: endl; PrintStr (str); return 0;} void PrintStr (char * str, int flag) {static int count = 0; // The non-connectivity static variable is initialized only once and always exists + + count; if (! Flag) std: cout <str <std: endl; elsefor (int I = 0; I <count; ++ I) std :: cout <str <std: endl ;}
 

8-2

#include 
 
    #include 
  
     struct CandyBar{char name[30];double weight;int heat;};void setCandyBar(CandyBar &c, const char *s = "Millennium Munch", const double w = 2.85, const int h = 350);void disp(const CandyBar &c);int main(){CandyBar c;setCandyBar(c);disp(c);char name[30];double weight;int heat;std::cin.getline(name, 30);std::cin >> weight >> heat;setCandyBar(c, name, weight, heat);disp(c);return 0;}void setCandyBar(CandyBar &c, const char *s, const double w, const int h){strcpy(c.name, s);c.weight = w;c.heat = h;}void disp(const CandyBar &c){std::cout << c.name << std::endl << c.weight << std::endl << c.heat << std::endl;}
  
 

8-3

#include 
 
    #include 
  
       void changeUpper(std::string &s);    int main()  {      std::string s;      while(getline(std::cin, s) && s[0] != 'q')      {          changeUpper(s);          std::cout << s << std::endl;      }      return 0;  }    void changeUpper(std::string &s)  {      for(int i = 0; i < s.size(); ++i)          s[i] = toupper(s[i]);  }  
  
 

8-4

# Include
 
  
# Include
  
   
Struct stringy {char * str; int ct ;}; void set (stringy & s, const char * str); void show (const char * str, const int count = 1 ); void show (const stringy & s, const int count = 1); int main () {stringy beany; char testing [] = "Reality isn' t what it used to be. "; set (beany, testing); show (beany, 2); testing [0] = 'D'; testing [1] = 'U '; show (testing); show (testing, 3); show ("Done! "); Return 0;} void set (stringy & s, const char * str) {int len = strlen (str); s. ct = len; s. str = new char (len + 1); // You Need To Leave a character to store '\ 0'. Therefore, len + 1 space is allocated to strcpy (s. str, str);} void show (const char * str, const int count) {for (int I = 0; I <count; ++ I) std :: cout <str <std: endl;} void show (const stringy & s, const int count) {for (int I = 0; I <count; ++ I) std: cout <s. str <std: endl ;}
  
 

8-5

#include 
 
      template 
  
     T max5(T *a);    int main()  {      int a[5] = {2, 3, 1, 5, 4};      double b[5] = {1.1, 3.3, 5.5, 4.4, 2.2};      std::cout << max5(a) << std::endl;      std::cout << max5(b) << std::endl;      return 0;  }    template 
   
      T max5(T *a)  {      T max = -1;      for(int i = 0 ;i < 5 ; ++i)          max = max < a[i] ? a[i] : max;      return max;  }  
   
  
 

8-6

#include 
 
    #include 
  
       template 
   
      T maxn(T *a, int len);    template <> char *maxn(char *a[], int len);    int main()  {      int a[6] = {1, 2, 3, 4, 5, 6};      double b[4] = {1.1, 2.2, 3.3, 4.4};      char *c[5] = {"fuck", "fuckfuck", "fuckfuckfuck", "fuckfuckfuckfuck", "fuckfuckfuckfuckfuck"};      std::cout << maxn(a, 6) << std::endl;      std::cout << maxn(b, 4) << std::endl;      std::cout << maxn(c, 5) << std::endl;      return 0;  }    template 
    
       T maxn(T *a, int len)  {      T max = -1;      for(int i = 0 ; i < len ; ++i)          max = max < a[i] ? a[i] : max;      return max;  }    template <> char *maxn(char *a[], int len)  {      int max = -1;      char *p = NULL;      for(int i = 0 ; i < len ; ++i)      {          if((int)strlen(a[i])> max)          {              max = strlen(a[i]);              p = a[i];          }      }      return p;  }  
    
   
  
 

8-7

#include 
 
      struct debts  {      char name[50];      double amount;  };    template 
  
     T SumArray(T a[], int n);    template 
   
      T SumArray(T *a[], int n);    int main()  {      int things[6] = {13, 31, 103, 301, 310, 130};      debts mr_E[3] = {          {"Ima Wolfe", 2400.0},          {"Ura Foxe", 1300.0},          {"Iby Stout", 1800.0}      };      double * pd[3];      for(int i = 0 ; i < 3 ; ++i)          pd[i] = &mr_E[i].amount;      std::cout << SumArray(things, 6) << std::endl;      std::cout << SumArray(pd, 3) << std::endl;      return 0;  }    template 
    
       T SumArray(T a[], int n)  {      T sum = 0 ;      for(int i = 0 ; i < n ; ++i)          sum += a[i];      return sum;  }    template 
     
        T SumArray(T *a[], int n)  {      T sum = 0;      for(int i = 0 ; i < n ; ++i)          sum += *a[i];      return sum;  }