hour06_2.cpp

来自「《24学时精通c++》的随书源码的下半部分。欢迎下载学习。」· C++ 代码 · 共 16 行

 //Listing 6.13 //Illustrates nested for loops #include <iostream>  int main() {     int rows, columns;
     int i;     char theChar;     std::cout << "How many rows? ";     std::cin >> rows;     std::cout << "How many columns? ";     std::cin >> columns;     std::cout << "What character? ";     std::cin >> theChar;
     i = 0;
     while (i < rows)     {         for (int j = 0; j < columns; j++)             std::cout << theChar;
      // To replace the second for loop, comment the above 2 lines
      // and uncomment the next 6
      // j = 0;
      // while (j < columns)
      // {
      //    std::cout << theChar;
      //    j++;
      // }
      // Note that the for did not have a block {} but the while
      // does because it has more than one statement (j++ is the second).
         std::cout << "\n";
         i++;     }     return 0; }