如果某一常量与其它常量密切相关，应在定义中包含这种关系，而不应给出一些孤立的值
如果某一常量与其它常量密切相关，应在定义中包含这种关系，而不应给出一些孤立的值。
例如： const float RADIUS = 100; const float DIAMETER = RADIUS * 2;
1 #include <iostream> 2 #include <string> 3 4 using namespace std; 5 6 //测试字符串(string)对象 7 /* run this program using the console pauser or add your own getch, system("pause") or input loop */ 8 9 int main(int argc, char** argv) { 10 //创建string对象,并显示 11 string s1; 12 string s2="ABCDEFGHIJK"; 13 string s3=s2; 14 string s4(20,'A'); 15 string s5(s2,3,3); 16 cout<<"s1="<<s1<<endl; 17 cout<<"s2="<<s2<<endl; 18 cout<<"s3="<<s3<<endl; 19 cout<<"s4="<<s4<<endl; 20 cout<<"s5="<<s5<<endl; 21 22 //为string对象输入数据,并显示 23 cout<<"s1="; 24 cin>>s1; 25 cout<<"s2="; 26 cin>>s2; 27 cout<<"s3="; 28 cin>>s3; 29 cout<<"s4="; 30 cin>>s4; 31 cout<<"s5="; 32 cin>>s5; 33 34 cout<<"s1="<<s1<<endl; 35 cout<<"s2="<<s2<<endl; 36 cout<<"s3="<<s3<<endl; 37 cout<<"s4="<<s4<<endl; 38 cout<<"s5="<<s5<<endl; 39 40 return 0; 41 }
