1# include<stdio.h>2 void main()3{4 int x=0,y,z;5 while(x<=19)6{y=0;7 while(y<=33)8 {z=100-x-y;9 if(5.0 * x+3.0 * y+z/3.0==100.0)10 printf("%d %d %d\n",x,y,z); 11 y++; } x++; } }11行后面 加 else 与不加else的区别