joc12.cpp: In function `int main()': joc12.cpp:15: warning: comparison between signed and unsigned integer expressions joc12.cpp:17: warning: comparison between signed and unsigned integer expressions joc12.cpp:19: warning: comparison between signed and unsigned integer expressions joc12.cpp:26: warning: comparison between signed and unsigned integer expressions joc12.cpp:28: warning: comparison between signed and unsigned integer expressions /tmp/ccM7CU9A.o(.text+0x53): In function `main': : the `gets' function is dangerous and should not be used.