c++ primer plus 第五章编程练习

 #include <iostream>  using namespace std;  int main() {     const   char *y_mouth[3][12]= //若去掉const g++会有waring vs2008却没有    {         {"1-1","1-2","1-3","1-4","1-5","1-6","1-7","1-8","1-9","1-10","1-11","1-12"},         {"2-1","2-2","2-3","2-4","2-5","2-6","2-7","2-8","2-9","2-10","2-11","2-12"},         {"3-1","3-2","3-3","3-4","3-5","3-6","3-7","3-8","3-9","3-10","3-11","3-12"}     };           int num = 0,y_sum = 0,t_sum = 0;     for(int a = 0;a<3;a++)      {         for(int b = 0;b<12;b++)         {              cout << y_mouth[a][b] << " : ";             cin >> num;             y_sum += num;                       }          cout << "y_sum" << a+1 << "year : " << y_sum << endl;          t_sum+=y_sum;         y_sum = 0;      }         cout << "t_sum = " << t_sum << endl;      return 0;  }