C++PrimerPlus(6th)第六章编程练习题答案 .pdfVIP

C++PrimerPlus （6th）第六章编程练习题答案 1.读取键盘输⼊ #include stdafx.h #includeiostream #includestring using namespace std; int main() { char ch=0; coutPlease enter:; while((ch=cin.get())!=@) { if(isdigit(ch)) { continue; } else if (islower(ch)) { cout(char)toupper(ch); } else if (isupper(ch)) { cout (char)tolower(ch)endl;; } } cout Ending endl; return 0; } 2.存⼗个数值 #include stdafx.h #includeiostream #includestring #includearray using namespace std; const unsigned int SIZE=10; int main() { arraydouble,SIZE donation; int enter=0; double total_value=0.0; double avg=0.0; int over_avg=0; coutPlease enter ten doulbe value(Non-numeric to exit):; while(enter10(cindonation[enter])) { total_value+=donation[enter]; enter++; } avg=total_value/enter; for(int i=0;ienter;i++) { if(donation[i]avg) { over_avg++; } } coutThe average value is avg,and there are over_avg double value more than average !endl; return 0; } 3.菜单驱动程序 #include stdafx.h #includeiostream #includestring using namespace std; int main() { char ch=0; coutPlease enter one of the following choices:\n c) carnivore p)pianist \n t) tree g)game\n; while(cinch) { switch(ch) { case c: coutcarnivoreendl; break; case p: cout pianist endl; break; case t: cout A map is a tree endl; break; case g: cout game endl; break; default: cout Please enter a c, p, t or g:; break; } } return 0; } 4.BOP #