Help write a small program in C language.

# include & ltstdio.h & gt// refers to the standard I/O library header file, which you can regard as a fixed format. If you don't understand,

Int main()//main main function

{

printf(" a b \ n ")；

printf(" a \ n ")；

printf(' b \ n ')；

printf(" a b \ n ")；

Returns 0; //The return value is 0, which can also be considered as a fixed format.

}

//is a comment line

If compiled, you can download a VC6.0 compiler yourself.