Compilare: user.cpp: In function ‘int main()’: user.cpp:98:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d\n",&N,&M); ^ user.cpp:101:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",s); ^ user.cpp: In function ‘void Road()’: user.cpp:62:20: warning: ‘x0’ may be used uninitialized in this function [-Wmaybe-uninitialized] idx[x0][y0] = 0; ^ user.cpp:62:20: warning: ‘y0’ may be used uninitialized in this function [-Wmaybe-uninitialized]