main()                                       main()
{                                                {                                         
 int m,k,j;                                    int m ,k,j;
for(m=1;m<=5;m++)                   for(m=1;m<=5;m++)
{                                                 {
for (k=1;k<=5-m;k++) printf(" ");  for(k=1;k<=5-m;k++) printf(" ");   
for (j=1;j<=2*m-1;j++) printf("*"); for (j=1;j<=5-m;j++) printf("*");                                    
printf("\n");                                   printf("\n");
}                                                   }
}                                                   }
这两个小程序有什么不一样，我知道出的图形不一样，谁能帮我详细分析一下里面倒底是怎么循环的！谢谢！