int main()
{
//srand(time_t(NULL));
time_t t;
srand((unsigned) time(&t));
char filename[100] = "hep.txt";
bool directed = false;
int R = 100;
Graph::BuildFromFile2WC(filename);
.....
}
//下面是调用的原函数
void Graph::BuildFromFile2WC(char *file){
if (built)
return;
built = true;
FILE* in = fopen(file, "r");
fscanf(in,"%ld %ld", &n, &m);
....}
执行到Graph::BuildFromFile2WC(filename);时就显示 segmentation fault,怎么解决啊,求大神指点