Compilare: user.cpp: In function ‘int CalculateW(char*)’: user.cpp:13:22: warning: NULL used in arithmetic [-Wpointer-arith] while(obstacles[i]!=NULL) ^ user.cpp: In function ‘int main()’: user.cpp:82:45: warning: format ‘%s’ expects argument of type ‘char*’, but argument 5 has type ‘char (*)[5]’ [-Wformat=] fscanf(in,"%d %d %s ",&x,&y,&obstacles); ^ user.cpp:76:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %d ",&t,&n,&m); ^ user.cpp:82:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %s ",&x,&y,&obstacles); ^