Compilare: user.cpp: In function ‘int main()’: user.cpp:56:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[50010]’ [-Wformat=] scanf("%s",&s); ^ user.cpp:58:9: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] s[l]=NULL; ^ user.cpp:63:22: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[50010]’ [-Wformat=] scanf("%s",&s); ^ user.cpp:65:13: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] s[l]=NULL; ^ user.cpp:52:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.in","r",stdin); ^ user.cpp:53:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.out","w",stdout); ^ user.cpp:55:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:56:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s); ^ user.cpp:63:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s); ^