pluton.cpp: In function `void proc()': pluton.cpp:40: warning: comparison between signed and unsigned integer expressions pluton.cpp: In function `int main()': pluton.cpp:73: warning: comparison between signed and unsigned integer expressions pluton.cpp:84: warning: comparison between signed and unsigned integer expressions pluton.cpp:89: warning: comparison between signed and unsigned integer expressions pluton.cpp:72: warning: `int imax' might be used uninitialized in this function