终究错在哪里了？

C/C++ code

int getsth(FILE* & filein, int &obj1, char &obj2){    //返回值：0~eof   1~数字  2~运算符    if(fscanf(filein,"%d",&obj1) == 1)        return 1;    if(fscanf(filein,"%c",&obj2) == 1)    {        if(obj2 == ' ')        {            return getsth(filein, obj1, obj2);        }        else            return 2;    }}//调用如下：operators.push('\n'); //堆栈state = getsth(filein, num, ch);while(state == 1 ||(state == 2 && ch != '\n') || operators.top() != '\n'){   if(state == 1)   {       operands.push(num);       state = getsth(filein, num, ch);   }   else       //

filein文件中的内容是4 + 3\n,我在调试的时候，第一次跳进getsth()，把4读进num里，return 1,第二次把空格读进ch里，然后进入这里面
if(fscanf(filein,"%c",&obj2) == 1)
{
if(obj2 == ' ')
{
return getsth(filein, obj1, obj2);
}
}调用自身，然后本来该读取‘+’了，但是直接跳进了
if(fscanf(filein,"%d",&obj1) == 1)
return 1;
并把3读进了num，请高人指点，郁闷中。。。


[解决办法]
你递归，当然是从if(fscanf(filein,"%d",&obj1) == 1)先开始喽