Compilare: main.cpp: In function 'int main()': main.cpp:21:24: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[30]' [-Wformat=] scanf("%s\n",&s); ^ main.cpp:15:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("queue.in","r",stdin); ^ main.cpp:17:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ main.cpp:21:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",&s); ^