links.cpp: In function `int href(char*, int)': links.cpp:22: warning: NULL used in arithmetic links.cpp:24: warning: NULL used in arithmetic links.cpp: In function `int main()': links.cpp:131: warning: assignment to non-pointer type `char' from NULL links.cpp:131: warning: argument to non-pointer type `char' from NULL /tmp/ccsYsSX6.o(.text+0x2b1): In function `main': : the `gets' function is dangerous and should not be used.