palc.cpp: In function `int main()': palc.cpp:14: warning: comparison between signed and unsigned integer expressions palc.cpp:18: warning: comparison between signed and unsigned integer expressions palc.cpp:30: warning: comparison between signed and unsigned integer expressions palc.cpp:34: warning: comparison between signed and unsigned integer expressions /tmp/ccn7XMpX.o(.text+0x42): In function `main': : the `gets' function is dangerous and should not be used.