Compilare: user.cpp: In function ‘int main()’: user.cpp:238:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (b<op.size()){ ^ user.cpp:244:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<moft.size();j++) ^ user.cpp: In function ‘int getInt()’: user.cpp:184:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ user.cpp: In function ‘int main()’: user.cpp:198:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("moft.in","r",stdin); ^ /tmp/ccE1IDRC.o: In function `getInt()': user.cpp:(.text+0x4c0): warning: the `gets' function is dangerous and should not be used.