Compilare: user.cpp: In function ‘int main()’: user.cpp:37:21: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[100]’ [-Wformat=] scanf("%s%c",&s1,&ch); ^ user.cpp:38:15: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[100]’ [-Wformat=] scanf("%s",&s2); ^ user.cpp:53:14: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘short int*’ [-Wformat=] scanf("%d",&n); ^ user.cpp:56:19: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[101]’ [-Wformat=] scanf("%s",&sir); ^ user.cpp:35:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bifo.in","r",stdin); ^ user.cpp:36:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bifo.out","w",stdout); ^ user.cpp:37:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s%c",&s1,&ch); ^ user.cpp:38:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s2); ^ user.cpp:53:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:56:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&sir); ^