c++-primer-plus（第六版）第二至第六章课后编程练习全部答案

double sum=0,average=0;

arrayad={0}; int i=0,total=0;

double temp;

while(cin>>temp&&i<10&&!isdigit(temp)) {

ad[i]=temp; sum+=ad[i]; ++i; }

if(i!=0) average=sum/i;

for(int j=0;javerage) ++total;

cout<<\这些数字的平均值为\ cout<<\并且共有\个数字大于平均值。\\n\

return 0; }

//ex.6.3

#include

int main() {

using namespace std;

cout<<\ <<\

<<\书上的这个f个人认为是打印错误

cout<<\

char ch; cin>>ch;

while(ch!='c'&&ch!='p'&&ch!='t'&&ch!='g')

{

cout<<\ cin>>ch; }

switch(ch) {

case 'c':

cout<<\ break; case 'p':

cout<<\ break; case 't':

cout<<\ break; case 'g':

cout<<\ }

return 0; }

//ex.6.4

#include const int strsize=20;

struct bop{

char fullname[strsize]; char title[strsize]; char bopname[strsize]; int preference; };

int main() {

using namespace std;

cout<<\ <<\ <<\ <<\ char ch; bop member[5]={

{\

{\

{\ {\ {\

};

cout<<\ while(cin>>ch&&ch!='q') {

switch(ch) {

case 'a':

for(int i=0;i<5;i++)

cout<

for(int i=0;i<5;i++)

cout<

for(int i=0;i<5;i++)

cout<

for(int i=0;i<5;i++) {

if(member[i].preference==0) cout<

break;

}

cout<<\ }

cout<<\ return 0; }

//ex.6.5

#include int main()

{

using namespace std;

double income,revenue;

cout<<\请输入你的收入：\ while(cin>>income&&income>=0) {

if(income<=5000) revenue=0.0;

else if(income<=15000) revenue=0.1*(income-5000); else if(income<=35000)

revenue=0.1*(15000-5000)+0.15*(income-15000); else

revenue=0.1*(15000-5000)+0.15*(35000-15000)+0.2*(income-35000);

cout<<\你的所得税为\ cout<<\请输入你的收入：\ }

return 0; }

//ex.6.6

#include #include using namespace std; struct patron{ string name; double money; };

int main() {

int num,temp=0;

cout<<\请输入捐款的人数：\ cin>>num; cin.get();