evo.cpp: In function `int main()': evo.cpp:21: warning: comparison between signed and unsigned integer expressions evo.cpp:27: warning: assignment to non-pointer type `char' from NULL evo.cpp:27: warning: argument to non-pointer type `char' from NULL evo.cpp:33: warning: comparison between signed and unsigned integer expressions evo.cpp:35: warning: comparison between signed and unsigned integer expressions evo.cpp:42: warning: comparison between signed and unsigned integer expressions evo.cpp:6: warning: `int l1' might be used uninitialized in this function /tmp/ccVpgiYa.o(.text+0x82): In function `main': : the `gets' function is dangerous and should not be used.