[C][string] sscanf用法

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main()
{
   int day, year;
   char weekday[20], month[20], tmp[100];

   strcpy(tmp, "Saturday March aaa 25 1999");
   
   /*"%*s" means ignore aaa*/
   sscanf(tmp, "%s %s %*s %d %d", weekday, month, &day, &year);

   printf("%s %d %d %s", month, day, year, weekday);
    
   return(0);
}

/*
[Result]
March 25 1999 Saturday
*/

%*s 表示可以忽略字串的中aaa

%[^@] 表示取@以前的字串

Example:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main()
{
    char text[] = "username@example.com";

    sscanf(text, "%[^@]", text); 

    printf("text: %s",text);
    
    return(0);
}

/*
[Result]
text: username
*/