spider.cpp: In function `int fill(int, int, int)': spider.cpp:45: warning: `int p_col' might be used uninitialized in this function spider.cpp:45: warning: `int revdir' might be used uninitialized in this function spider.cpp: In function `int main()': spider.cpp:126: warning: `int p_ln' might be used uninitialized in this function spider.cpp:126: warning: `int p_col' might be used uninitialized in this function /tmp/ccd8uwe2.o(.text+0x5ad): In function `main': : the `gets' function is dangerous and should not be used.