小编给大家分享一下IO之Formatted IO的示例代码，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！
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Formatted I/O
/* ANSI *//* write a formatted string to the standard output stream */int printf(char *, ...);/* write a formatted string to a buffer */int sprintf(char *, char *, ...);/* write a formatted string to a buffer, not exceeding buffer size */int snprintf(char *, size_t, char *, ...);/* write a formatted string to a stream */int fprintf(FILE *, char *, ...);/* write a formatted string to a stream */int vfprintf(FILE *, char *, va_list);/* write a string formatted with a variable argument list to standard output */int vprintf(char *, va_list);/* write a string formatted with a variable argument list to a buffer */int vsprintf(char *, char *, va_list);/* write a string formatted with a variable argument list to a buffer, not exceeding buffer size */int vsnprintf(char *, size_t, char *, va_list);/* write a formatted string to an output function */int oprintf(OPRINTF_OUTPUT_FUNCPTR routine, _Vx_usr_arg_t arg, char *, ...);/* write a formatted string to an output function */int voprintf(OPRINTF_OUTPUT_FUNCPTR routine , _Vx_usr_arg_t arg, char *, va_list);/* read and convert characters from the standard input stream */int scanf(char *, ...);/* read and convert characters from an ASCII string */int sscanf(char *, char *, ...);/* read and convert characters from a stream */int fscanf(FILE *, char *, ...);
格式化的定义可以看这里
/* WRS functions declarations *//* write a formatted string to a file descriptor */int fdprintf(int, char *, ...);/* write a string formatted with a variable argument list to a file descriptor */int vfdprintf(int, char *, va_list);/* write a formatted string to the standard error stream */int printErr(char *, ...);/* print an exception-generated error message */void printExc(char *, int, int, int, int, int);
当然了，还有kprintf
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