5.6
#include <iostream>
#include <string>
void main56()
{
using std::cout;
using std::cin;
using std::string;
string m[12]={"1","2","3","4","5","6","7","8","9","10","11","12"};
const string *s=m;
int arr[3][15];
int sum=0;
for(int i=0;i<3;i++)
{
for(int j=0;j<12;j++,s++)
{
cout<<"Please enter the "<<i+1<<" years "<<*s<<" moth sales:";
cin>>arr[i][j];
sum+=arr[i][j];
cout<<"Now sum is "<<sum<<"
";
}
s=m;//重新令s指向m的开头
}
cout<<"All sum is "<<sum<<", THE END
";
cin.get();
}
5.7
#include <iostream>
#include <string>
using namespace std;
struct car{
string name;
int year;
};
void get(car *);
void show(const car const *);
void main57()
{
cout<<"How many cars do your wish to catalog?";
int num;
cin>>num;
car *c=new car[num];
for(int i=0;i<num;i++,c++)
{
cout<<"Car #"<<i+1<<":"<<endl;
get(c);
show(c);
}
cin.get();
}
void get(car *c)
{
cin.get();
cout<<"Please enter the make:";
string name;
getline(cin,name);
cout<<"
please enter the years of make:";
int y;
cin>>y;
c->name=name;
c->year=y;
}
void show(const car const *c)
{
cout<<"/nHere is your collection: ";
cout<<c->year<<" "<<c->name<<endl;
}
5.8有点BUG，详看5.9，我懒得改了
#include <iostream>
#include <cstring>
using namespace std;
void main58()
{
char test[20];
int count=0;
char ch;
int i=0;
cout<<"Enter words (to stop,type the word done):";
//cin.get();
while(strcmp(test,"done")!=0)
{
//cout<<"is in"<<endl;
//cin.get(ch)>>test[i];
cin.get(ch);
if(ch==' ')
{
test[i]=' ';
count++;
//cout<<"i=0"<<test<<"
count="<<count;
i=0;
}
else
{
test[i]=ch;
test[i+1]=' ';
//cout<<"i++"<<test<<endl;
i++;
}
}
cout<<"You entered a total of "<<count<<" words";
cin.get();
}5.9
#include <iostream>
#include <string> //cstring 没有定义string类型的符号运算符，例如==,!=
//要注意输入是这种情况 doneff ajgk done，这时候，要注意doneff的判断 增加flag量
using namespace std;
void main59()
{
string test="";
string t="done";
//if(test==t)
char ch;
int count=0;
int flag=1;
cout<<"Enter words (to stop, type the word done):"<<endl;
//cin.get();
while(test!=t)
{
//cout<<"Test2="<<test<<" Count="<<count<<endl;
//cout<<"here"<<endl;
flag=1;
while(flag==1)
{
cin.get(ch);
if(ch=='
') //回车键的表示
break;
else if(ch!=' ')
{
test=test+ch;
}
else
{
test="";
count++;
flag=0;
}
//cout<<"test1="<<test<<" count="<<count<<endl;
//cout<<"in in"<<endl;
}
}
cout<<"You enter a total of "<<count<<" words";
cin.get();
}5.10
#include <iostream>
void main510()
{
using namespace std;
int row;
cout<<"Enter number of rows:";
cin>>row;
for(int i=0;i<row;i++)
{
for(int j=0;j<row;j++)
{
if(j<row-i-1)
cout<<".";
else
cout<<"*";
}
cout<<endl;
}
cin.get();
}