# include <stdio.h>
main()
{
    int a=1,b=2,c=3; ++a; c+=++b; //a = 2  c = 6
    {   
         int b=4,c; c=b*3; a+=c; // c = 12  a = 14
         printf("first:%d,%d,%d\n",a,b,c); // a = 14 b = 4 c = 12
         a+=c;//a = 26
         printf("Second:%d,%d,%d\n",a,b,c); //a = 26 b = 4 c = 12
    }
   printf("third:%d,%d,%d\n",a,b,c); // a =26 b = 3 c = 6  这里的b和c的值怎么不是4 和12呢？
}

那 a的值怎么不是2  又是26咯   

3Q  这下明白了。