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// 行缓冲区
// 写数据时遇到换行符,则刷新缓冲
// 如果行缓冲不刷新时,则不会输出结果。
// 因为输出的内容没有遇到换行符(Linux `\n`), Window(`\r\n`)。
#include <stdio.h>
int main()
{
printf("Hello World"); // 缓冲区未写满,不会刷新缓冲区,不会输出
while (1)
;
return 0; // 缓冲未写满,不会刷新缓冲区,不会退出程序
}