Compilare: user.cpp: In function ‘bool cmp(std::vector<char>, std::vector<char>)’: user.cpp:13:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i <= a.size() && i <= b.size(); i++) ^ user.cpp:13:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i <= a.size() && i <= b.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:27:24: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(s[i] >= 'A' && s[i] <= 'Z' || s[i] >= '1' && s[i] <= '9') ^ user.cpp:29:29: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] else if(s[i] >= 'a' && s[i] <= 'z' || s[i] >= '1' && s[i] <= '9') { ^ user.cpp:30:31: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] for(; s[i] >= 'a' && s[i] <= 'z' || s[i] >= '1' && s[i] <= '9'; i++) ^ user.cpp:51:35: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘std::vector<std::vector<char> >::size_type {aka unsigned int}’ [-Wformat=] printf("%ld", rezultate.size()); ^ user.cpp:52:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < rezultate.size(); i++) { ^ user.cpp:54:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < rezultate[i].size(); j++) ^ user.cpp:23:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dir.in", "r", stdin); ^ user.cpp:24:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dir.out", "w", stdout); ^ user.cpp:25:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/cc40ZFoX.o: In function `main': user.cpp:(.text.startup+0x63): warning: the `gets' function is dangerous and should not be used.