Compilare: user.cpp: In function ‘int main()’: user.cpp:48:36: warning: passing NULL to non-pointer argument 2 of ‘void* memset(void*, int, size_t)’ [-Wconversion-null] memset(str,NULL,sizeof(str)); ^ user.cpp:49:38: warning: passing NULL to non-pointer argument 2 of ‘void* memset(void*, int, size_t)’ [-Wconversion-null] memset(strr,NULL,sizeof(strr)); ^ user.cpp:92:31: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if ((ci >> j) & 1 == 1) ^ user.cpp:42:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("logic.in","r",stdin); ^ user.cpp:43:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("logic.out", "w", stdout); ^ user.cpp:46:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (scanf("%d\n", &n); n; --n) ^ user.cpp:50:18: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(str); ^ user.cpp:51:19: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(strr); ^ /tmp/cckqndRw.o: In function `main': user.cpp:(.text.startup+0xbd): warning: the `gets' function is dangerous and should not be used.