Compilare: user.cpp: In function ‘int main()’: user.cpp:163:19: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] Mrn[cif+1]=NULL; ^ user.cpp: In function ‘void Parser()’: user.cpp:83:12: 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:100:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("viteza.in","r",stdin); ^ user.cpp:101:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("viteza.out","w",stdout); ^ /tmp/ccpUCyrW.o: In function `Parser()': user.cpp:(.text+0x1db): warning: the `gets' function is dangerous and should not be used.