valet.cpp: In function 'int main()': valet.cpp:18: warning: comparison between signed and unsigned integer expressions valet.cpp:15: warning: 'p1' may be used uninitialized in this function valet.cpp:15: warning: 'p2' may be used uninitialized in this function valet.cpp:15: warning: 'p3' may be used uninitialized in this function valet.cpp:15: warning: 'p4' may be used uninitialized in this function