要定义函数呢

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 for(j=i;j<5;j++) 第一行不是有4个空格吗

所以j就是输出空格的意思，保证*的位置

    for(i=1; i<5; i++)                                   //这个最外边的for循环是从上到下的行数切换-.-

    {                                          //这个括号内有两个for循环上下并列--------

              for(j=i;j<5;j++)                                       //①这是第“一”个for循环 每次换下一行的时候就先输入空格

              {                                          //每当有一个j符合j<5就会有几个空格排列在这一行 直到j>=5 然后在切行循环

                  printf(" ");                       //下面的K同理 每切一行就在空格循环后边输入对应数量的“*”
              }

              for(k=0;k<2*i-1;k++)                              /*②这是第“二”个for循环 每一换行的时候输入“*” 不过这两个循环并列 每一行都是先第一个循环输入空格 再输入第二个循环的“*”*/

              {

                  printf("*"); 

              }

              printf("\n");                                   //这个\n就是换行的意思 这个是最外边循环的执行代码-.-

    }                                            //括号---------

那个…………还是解释一下子整个习题把QAQ谢谢，没有理解意思。