fscanf()问题

C/C++ code

int getsth(FILE* & filein, int &obj1, char &obj2){        if(fscanf(filein,"%d",&obj1) == 1)        {                printf("%d\n",obj1);                return 1;        }        if(fscanf(filein,"%c",&obj2) == 1)        {                if(obj2 == ' ')                {                        printf("空格\n");                        return getsth(filein, obj1, obj2);                }                else                {                        printf("%c\n",obj2);                        return 2;                }        }}int main(){        FILE *fp = fopen("data.txt", "r");        int obj1 = 0;        char obj2 = '\0';        int state = getsth(fp, obj1, obj2);        while(state == 1 ||(state == 2 && obj2 != '\n'))        {                if(state == 1)                {                        state = getsth(fp, obj1, obj2);                }                else                {                        break;                }        }        return 0;}

data.txt:
4 + 3
程序运行如下：
4
空格
3

为什么没有打印加号？

[解决办法]
int getsth(FILE* & filein, int &obj1, char &obj2)
{
int pos=ftell(filein);
。。。。。

可以跟踪一下文件指针，会有惊喜的