Compilare: user.cpp: In function ‘int main()’: user.cpp:29:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:38:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &a[i][j]); ^ user.cpp:53:17: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(s[x][y] != 1) { ^ user.cpp:53:17: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized]