0_0_38366877_4471.c 0_0_38366877_4471.c(2) : error C2061: 语法错误: 标识符“is_prime” 0_0_38366877_4471.c(2) : error C2059: 语法错误:“;” 0_0_38366877_4471.c(2) : error C2059: 语法错误:“类型”