Question

我的导师给了我一个作业，我必须编写一个只包含while循环和打印的代码：

我试了100次，失败了100次。由于我的知识有限，我开始认为我的导师只是弄乱了我的大脑。如果有可能，请向我介绍一个代码，按照该顺序打印数字。感谢...

Answer 1

    int i = 1;
    int LIMIT = 5;
    while (i <= LIMIT)
    {
        int j = 1;
        while (j <= LIMIT -i)   //Loop to print the desired space.
        {
            cout << " ";
            j++;
        }
        int k = i;             
        while(k)
        {
            cout<<k;               //Printing the digits
            k--;
        }
        cout << endl;         //Adding new line character at the end.
        i++;
    }

跟你的老师打个招呼：）

Answer 2

尝试下面的代码。我还在这里创建了一个示例工作代码http://goo.gl/gJqias

#include <iostream>

using namespace std;

int main()
{
int start_Index=1, maximum_Index=5;
while(start_Index<=maximum_Index)
{
   //below loop prints leading whitespaces
   //note that there are two whitespaces per number
   int temp_var=start_Index;

   while (maximum_Index-temp_var>0)
   {
     cout <<"  ";
     temp_var++;//note the post increment operator.
   }

   //below whiel loop prints lagging numbers with single whitespace before them
   temp_var=start_Index;
   while(temp_var>0)
   {
        cout<<" "<<temp_var--;//note the post decrement operator.
   }
   //Now we start over to next line
   cout<<endl;      
   //Increment the start_index by 1 
   start_Index++;
 }
 return 0;
}

Answer 3

int main(void)
{
    char str[11] = "          ";// Filled with 10 blank spaces
    int i=0;
    while(i < 5)
    {
        str[9 - 2*i] = (i+1) + 48;// +48 will give equivalent ASCII code
        printf("%s\n",str);
        i++;
    }
    return 0;
}

这只能使用while循环吗？

3 个答案: