ordonare.cpp: In function `int alexcmp(char*, char*)': ordonare.cpp:8: warning: comparison between signed and unsigned integer expressions ordonare.cpp:15: warning: comparison between signed and unsigned integer expressions ordonare.cpp:20: warning: NULL used in arithmetic ordonare.cpp:20: warning: NULL used in arithmetic ordonare.cpp:21: warning: NULL used in arithmetic ordonare.cpp:21: warning: NULL used in arithmetic ordonare.cpp: In function `int main()': ordonare.cpp:31: warning: unused variable `int pp' ordonare.cpp:32: warning: unused variable `char z[31]' /tmp/ccuTq2uV.o(.text+0x167): In function `main': : the `gets' function is dangerous and should not be used.