Compilare: user.cpp: In function ‘int main()’: user.cpp:17:22: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[256]’ [-Wformat=] scanf("%s",&s); ^ user.cpp:22:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<=strlen(s);++i){ ^ user.cpp:11:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ecuatii2.in","r",stdin); ^ user.cpp:12:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ecuatii2.out","w",stdout); ^ user.cpp:14:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:17:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s); ^