这个网站里面包含了所以得C库，方便查找笔记，http://www.cplusplus.com/reference/cstdio/sscanf/kw=sscanf

sscanf

int sscanf ( const char * s, const char * format, ...);

Parameters

s

C string that the function processes as its source to retrieve the data.

format

C string that contains a format string that follows the same specifications as format in scanf (see scanf for details).

... (additional arguments)

Depending on the format string, the function may expect a sequence of additional arguments, each containing a pointer to allocated storage where the interpretation of the extracted characters is stored with the appropriate type.
There should be at least as many of these arguments as the number of values stored by the format specifiers. Additional arguments are ignored by the function.

Return Value

Example

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/* sscanf example */
#include <stdio.h>

int main ()
{
  char sentence []="Rudolph is 12 years old";
  char str [20];
  int i;

  sscanf (sentence,"%s %*s %d",str,&i);
  printf ("%s -> %d\n",str,i);
  
  return 0;
}

Rudolph -> 12