Compilare: user.cpp: In function ‘int lcp(char*, char*)’: user.cpp:17:45: warning: value computed is not used [-Wunused-value] while (*a && *b && *a==*b) sol++,*a++,*b++; ^ user.cpp:17:47: warning: value computed is not used [-Wunused-value] while (*a && *b && *a==*b) sol++,*a++,*b++; ^ user.cpp: In function ‘int main()’: user.cpp:28:16: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d",sol); ^ user.cpp:21:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ghicit.in","r",stdin); ^ user.cpp:22:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ghicit.out","w",stdout); ^ user.cpp:23:10: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s+1); n=strlen(s+1); ^ /tmp/ccJg4uiy.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.