fflush 函数:
int fflush(FILE *stream);
fseek
fgetc getc getchar
fputc putc putchar
fgets gets
printf fprintf sprintf (for file string) %g double %% output "%"
%-10s ,%*s following 5,"string"
scanf fscanf ssanf (the purpose of inserting a blank is for ingnoring blank characters)
%[]:读取一个字符集合
other functions:
fgetpos fsetpos ftell rewind freipen setvbuf remove
原文：http://www.cnblogs.com/oh-mine/p/5634703.html