C++课本第二章课后习题 关于编程的试题

 1 #include <iostream>
 2 using namespace std; 
 3 int main()
 4 {
 5     int a;
 6     cout<<"输入一个数字:";
 7     cin>>a;
 8     cout<<a<<endl;
 9     return 0;     
10 }

 1 #include <iostream>
 2 using namespace std; 
 3 int main()
 4 {
 5     cout<<"the size of an int is:\t\t"<<sizeof(int)   <<"bytes.\n";
 6     cout<<"the size of a short int is:\t"<<sizeof(short)<<"bytes.\n";
 7     cout<<"the size of a char is:\t\t"<<sizeof(char)   <<"bytes.\n";
 8     cout<<"the size of a long int is:\t"<<sizeof(long)   <<"bytes.\n";
 9     cout<<"the size of a double int is:\t"<<sizeof(double)   <<"bytes.\n";
10     return 0;
11 }

 1 #include <iostream>
 2 using namespace std; 
 3 int main()
 4 {
 5 
 6     for(int i=32;i<128;i++)
 7     {
 8         cout<<(char) i;
 9     
10     }
11     return 0;
12 }