C语言新手学习文件，求解答putc 、getc和fputc、fgetc的区别？

fputc、fgetc和putc、getc同为对文件读写的操作函数，他们之间有何不同，具体用法是什么？是不是对象是不是文件的区别？

int fputc(int c, FILE *stream);
fputc() writes the character c, cast to an unsigned char, to stream.

int putc(int c, FILE *stream);
putc() is equivalent to fputc() except that it may be implemented as a
macro which evaluates stream more than once.

int fgetc(FILE *stream);
        fgetc() reads the next character from  stream  and  returns  it  as  an
   unsigned char cast to an int, or EOF on end of file or error.

int getc(FILE *stream);
        getc()  is equivalent to fgetc() except that it may be implemented as a
   macro which evaluates stream more than once.

 为了书写方便，系统把fputc和fgetc定义为宏名putc和getc:

#define putc(ch, fp) fputc(ch, fp)
#define getc(fp) fgetc(fp)

这个是在stdio.h中定义的，所以没有区别。