c语言while循环打印等腰三角型

int i=1,j,n,k;

       printf("请输入三角形的行数:\n");

       scanf("%d",&n);

       while(i<=n)

       {

             

              k=1;

              while(k<=n-i)

              {

                     printf(" ");

                     k++;

              }

              j=1;

              while(j<=2*i-1)

              {

                     printf("*");

                     j++;

              }

              printf("\n");

              i++;                                   

       }