View Compilation Error

0_0_28304507_8444.c
0_0_28304507_8444.c(5) : error C2065: “bool”: 未声明的标识符
0_0_28304507_8444.c(5) : error C2146: 语法错误: 缺少“;”(在标识符“s”的前面)
0_0_28304507_8444.c(5) : error C2065: “s”: 未声明的标识符
0_0_28304507_8444.c(5) : error C2065: “false”: 未声明的标识符
0_0_28304507_8444.c(18) : error C2065: “s”: 未声明的标识符
0_0_28304507_8444.c(18) : error C2065: “true”: 未声明的标识符
0_0_28304507_8444.c(21) : error C2065: “is”: 未声明的标识符
0_0_28304507_8444.c(21) : error C2065: “false”: 未声明的标识符