Compilare: user.cpp: In function ‘int main()’: user.cpp:20:35: warning: format ‘%s’ expects argument of type ‘char*’, but argument 4 has type ‘char (*)[10010]’ [-Wformat=] scanf("%d%d\n%s%s",&n,&l,&b,&s); ^ user.cpp:20:35: warning: format ‘%s’ expects argument of type ‘char*’, but argument 5 has type ‘char (*)[10010]’ [-Wformat=] user.cpp:23:9: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] b[0]=NULL; ^ user.cpp:26:9: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] s[0]=NULL; ^ user.cpp:17:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("potrivire.in","r",stdin); ^ user.cpp:18:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("potrivire.out","w",stdout); ^ user.cpp:20:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n%s%s",&n,&l,&b,&s); ^