test001.txt

一个小计算器的实现(编译原理),用Lex和bison

--> j=9.0;

--> if(j>0){print j;};
9.000000
-->
--> if(j<0){print j;};

-->
--> j=j+8;

--> print j;
9.000000
--> j+8;
9.000000
--> print j;
9.000000
--> j=j+8;

--> print j;
9.000000
--> i=j+8;

--> print i;
9.000000
--> j=9; i=j+9;print i;

-->
--> 0
--> j=9.0; i=j+9.0; print i;

-->
--> 18.000000
-->