Compilare: user.cpp: In function ‘int main()’: user.cpp:55:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carici.in", "r", stdin); ^ user.cpp:57:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma4.in", "r", stdin); ^ user.cpp:58:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma4.out", "w", stdout); ^ user.cpp:60:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:62:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &pyramid[i]); ^ user.cpp:50:33: warning: ‘sol_y’ may be used uninitialized in this function [-Wmaybe-uninitialized] y -= y_dir[rebuild[pos]]; ^ user.cpp:84:16: note: ‘sol_y’ was declared here int sol_x, sol_y; ^ user.cpp:49:33: warning: ‘sol_x’ may be used uninitialized in this function [-Wmaybe-uninitialized] x -= x_dir[rebuild[pos]]; ^ user.cpp:84:9: note: ‘sol_x’ was declared here int sol_x, sol_y; ^