Compilare: user.cpp: In function ‘int main()’: user.cpp:14:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.in","r",stdin); ^ user.cpp:15:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.out","w",stdout); ^ user.cpp:20:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n",&n,&m); ^ user.cpp:24:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^ user.cpp:30:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^ user.cpp:48:23: warning: ‘yo’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[xo][yo]=d[xo][yo]; ^ user.cpp:48:23: warning: ‘xo’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:61:25: warning: ‘yd’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d",a[xd][yd]-1); ^ user.cpp:61:25: warning: ‘xd’ may be used uninitialized in this function [-Wmaybe-uninitialized]