向各位大虾求救

 我在用MAPLAB IDE编译Ｃ文件用于控制pic16f877作字符显示,可是它报错如下：
Warning [361] D:\My Documents\456\test.c; 29.1 function declared implicit int
Error   [192] D:\My Documents\456\test.c; 35.1 undefined identifier "TRESB"
Error   [192] D:\My Documents\456\test.c; 36.1 undefined identifier "TRESC"
Error   [984] D:\My Documents\456\test.c; 41.1 type redeclared
Error   [192] D:\My Documents\456\test.c; 45.21 undefined identifier "desptime"
Error   [192] D:\My Documents\456\test.c; 55.19 undefined identifier "outPORT"
请问是为什么，我已经写了包含头文件"#include<pic.h>"

复制的好乱