numstack.array[numstack.top-1]=num;
return ok;
}
else return error;
}
//数字出栈的函数
status popnum(numstack &numstack,double &num){
if(numstack.top>０){
num=numstack.array[numstack.top-1];
numstack.top--;
return ok;
}
else return error;
}
//操作符进栈的函数
