View Compilation Error

0_0_19000906_2765.c
0_0_19000906_2765.c(1) : error C2061: 语法错误: 标识符“PI”
0_0_19000906_2765.c(1) : error C2059: 语法错误:“;”
0_0_19000906_2765.c(1) : error C2059: 语法错误:“常量”
VC2013\INCLUDE\crtdefs.h(642) : error C2081: “uintptr_t”: 形参表中的名称非法
0_0_19000906_2765.c(8) : error C2065: “PI”: 未声明的标识符