题1

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
bool flag=true;
cout<<flag<<endl;
cout<<boolalpha<<flag<<endl;
cout<<flag+5<<endl;
flag=0;
cout<<"执行语句 flag=3；后flag的值为:"<<boolalpha<<flag<<endl;
flag=0.0;
cout<<"执行语句 flag=8; 后flag的值为:"<<boolalpha<<flag<<endl;
return 0;
}

#include <iostream>
using namespace std;
int main()
{
int i = 6,j,k,temp;
j = ++i;
k = i++;
++i = 1;
cout<<"i = "<<i<<endl
<<"j = "<<j<<endl
<<"k = "<<k<<endl;
return 0;
}

#include <iostream>
using namespace std;
int main()
{
char ch;
cout<<"please input a character:";
cin>>ch;
ch = ch >= 'a' && ch <= 'z' ? ch - 'a' +'A' :ch;
cout<<"The result is:"<<ch<<endl;
return 0;
}

#include <iostream>
using namespace std;
int main()
{
int ab,ac;
double b = 3.14;
char c = 'S';
ab = int(b);
ac = int(c);
cout<<"b = "<<b<<endl;
cout<<"ab = "<<ac<<endl;
cout<<"c = "<<c<<endl;
cout<<"ac = "<<ac<<endl;
return 0;
}

以上是课本例题，