Compilare: user.cpp: In function ‘int main()’: user.cpp:53:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.cpp:54:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.cpp:60:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%c", &c); ^ user.cpp:91:32: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<tmin-1<<" "<<x<<" "<<y<<'\n'; ^ user.cpp:91:24: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<tmin-1<<" "<<x<<" "<<y<<'\n'; ^ user.cpp:78:27: warning: ‘yf’ may be used uninitialized in this function [-Wmaybe-uninitialized] Lee(xf, yf, xi, yi, b); ^ user.cpp:78:27: warning: ‘xf’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:78:27: warning: ‘yi’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:78:27: warning: ‘xi’ may be used uninitialized in this function [-Wmaybe-uninitialized]