Compilare: user.cpp: In function ‘int main()’: user.cpp:35:32: warning: format ‘%c’ expects argument of type ‘char*’, but argument 3 has type ‘long int*’ [-Wformat=] scanf("%ld\n%c%ld",&n,&c,&p); ^ user.cpp:31:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("procente.in","r",stdin); ^ user.cpp:32:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("procente.out","w",stdout); ^ user.cpp:35:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld\n%c%ld",&n,&c,&p); ^