Compilare: user.cpp: In function ‘int main()’: user.cpp:20:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(r);i++) { ^ user.cpp:17:6: warning: unused variable ‘re’ [-Wunused-variable] }re[101]; ^ user.cpp:19:15: warning: unused variable ‘inc’ [-Wunused-variable] int i,t=0,aux,inc=0; ^ user.cpp:9:36: 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:12:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(r); ^ /tmp/cc6dxS8v.o: In function `main': user.cpp:(.text.startup+0x4d): warning: the `gets' function is dangerous and should not be used.