/*****************************************************
** Name???????? : sscanf.c
** Author?????? : gzshun
** Version????? : 1.0
** Date???????? : 2011-12
** Description? : sscanf function
******************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static void sscanf_test(void);
static void sscanf_test(void)
{
?int ret;
?char *string;
?int? digit;
?char buf1[255];
?char buf2[255];
?char buf3[255];
?char buf4[255];
?/*1.最簡單的用法*/
?string = "china beijing 123";
?ret = sscanf(string, "%s %s %d", buf1, buf2, &digit);
?printf("1.string=%s/n", string);
?printf("1.ret=%d, buf1=%s, buf2=%s, digit=%d/n/n", ret, buf1, buf2, digit);
?/*
?**執行結果:
?**1.ret=3, buf1=china, buf2=beijing, digit=123
?**可以看出,sscanf的返回值是讀取的參數個數
?*/
?/*2.取指定長度的字符串*/
?string = "123456789";
?sscanf(string, "%5s", buf1);
?printf("2.string=%s/n", string);
?printf("2.buf1=%s/n/n", buf1);
?/*
?**執行結果:
?**2.buf1=12345
?*/
?/*3.取到指定字符為止的字符串*/
?string = "123/456";
?sscanf(string, "%[^/]", buf1);
?printf("3.string=%s/n", string);
?printf("3.buf1=%s/n/n", buf1);
?/*
?**執行結果:
?**3.buf1=123
?*/
?/*4.取到指定字符集為止的字符串*/
?string = "123abcABC";
?sscanf(string, "%[^A-Z]", buf1);
?printf("4.string=%s/n", string);
?printf("4.buf1=%s/n/n", buf1);
?/*
?**執行結果:
?**4.buf1=123abc
?*/
?/*5.取僅包含指定字符集的字符串*/
?string = "0123abcABC";
?sscanf(string, "%[0-9]%[a-z]%[A-Z]", buf1, buf2, buf3);
?printf("5.string=%s/n", string);
?printf("5.buf1=%s, buf2=%s, buf3=%s/n/n", buf1, buf2, buf3);
?/*
?**執行結果:
?**5.buf1=123, buf2=abc, buf3=ABC
?*/
?/*6.獲取指定字符中間的字符串*/
?string = "ios<android>wp7";
?sscanf(string, "%*[^<]<%[^>]", buf1);
?printf("6.string=%s/n", string);
?printf("6.buf1=%s/n/n", buf1);
?/*
?**執行結果:
?**6.buf1=android
?*/
?/*7.指定要跳過的字符串*/
?string = "iosVSandroid";
?sscanf(string, "%[a-z]VS%[a-z]", buf1, buf2);
?printf("7.string=%s/n", string);
?printf("7.buf1=%s, buf2=%s/n/n", buf1, buf2);
?/*
?**執行結果:
?**7.buf1=ios, buf2=android
?*/
?/*8.分割以某字符隔開的字符串*/
?string = "android-iphone-wp7";
?/*
?**字符串取道'-'為止,后面還需要跟著分隔符'-',
?**起到過濾作用,有點類似于第7點
?*/
?sscanf(string, "%[^-]-%[^-]-%[^-]", buf1, buf2, buf3);
?printf("8.string=%s/n", string);
?printf("8.buf1=%s, buf2=%s, buf3=%s/n/n", buf1, buf2, buf3);
?/*
?**執行結果:
?**8.buf1=android, buf2=iphone, buf3=wp7
?*/
?/*9.提取郵箱地址*/
?string = "Email:beijing@sina.com.cn";
?sscanf(string, "%[^:]:%[^@]@%[^.].%s", buf1, buf2, buf3, buf4);
?printf("9.string=%s/n", string);
?printf("9.buf1=%s, buf2=%s, buf3=%s, buf4=%s/n/n", buf1, buf2, buf3, buf4);
?/*
?**執行結果:
?**9.buf1=Email, buf2=beijing, buf3=sina, buf4=com.cn
?*/
?/*10.過濾掉不想截取或不需要的字符串--補充,
?**在%號后面加一*號,代表過濾這個字符串,不讀取
?*/
?string = "android iphone wp7";
?sscanf(string, "%s %*s %s", buf1, buf2);
?printf("10.string=%s/n", string);
?printf("10.buf1=%s, buf2=%s/n/n", buf1, buf2);
?/*
?**執行結果:
?**10.android wp7
?*/
}
int main(int argc, char **argv)
{
?sscanf_test();

?return 0;
}
/*
**測試程序
**環境:
**Linux ubuntu 2.6.32-24-generic-pae #39-Ubuntu SMP Wed Jul 28 07:39:26 UTC 2010 i686 GNU/Linux
**gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5)
**
gzshun@ubuntu:~/c/sscanf$ gcc sscanf.c -o sscanf
gzshun@ubuntu:~/c/sscanf$ ./sscanf
1.string=china beijing 123
1.ret=3, buf1=china, buf2=beijing, digit=123
2.string=123456789
2.buf1=12345
3.string=123/456
3.buf1=123
4.string=123abcABC
4.buf1=123abc
5.string=0123abcABC
5.buf1=0123, buf2=abc, buf3=ABC
6.string=ios<android>wp7
6.buf1=android
7.string=iosVSandroid
7.buf1=ios, buf2=android
8.string=android-iphone-wp7
8.buf1=android, buf2=iphone, buf3=wp7
9.string=Email:beijing@sina.com.cn
9.buf1=Email, buf2=beijing, buf3=sina, buf4=com.cn
10.string=android iphone wp7
10.buf1=android, buf2=wp7
*/