Compilare: user.cpp: In function ‘int main()’: user.cpp:41:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(r);i++) { ^ user.cpp:39:21: warning: unused variable ‘j’ [-Wunused-variable] int i,t=0,aux,inc=1,j,aux2; ^ user.cpp:40:6: warning: unused variable ‘ok’ [-Wunused-variable] bool ok; ^ user.cpp:34:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reteta2.in","r",stdin); ^ user.cpp:37:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(r); ^ user.cpp: In function ‘int ins(std::string, int)’: user.cpp:17:15: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] int j,z; ^ /tmp/ccDOMeSY.o: In function `main': user.cpp:(.text.startup+0x4d): warning: the `gets' function is dangerous and should not be used.