c语言如何写日志文件

1、示例代码如下

2、编译运行：gcc log.c -o log./log

3、返回结果：cat clog.txt2020-03-10 13:10:02 is running 10 55.5500002020-03-10 13:10:04 is running 10 55.5500002020-03-10 13:10:04 is running 10 55.550000