1 函数原型:  
2   
3 Int  sscanf( string str, string fmt, mixed var1, mixed var2 ... );  
4   
5 int scanf( const char *format [,argument]... );  

  1 /***************************************************** 
  2 ** Name         : sscanf.c  
  3 ** Author       : gzshun 
  4 ** Version      : 1.0 
  5 ** Date         : 2011-12 
  6 ** Description  : sscanf function 
  7 ******************************************************/  
  8 #include <stdio.h>  
  9 #include <stdlib.h>  
 10 #include <string.h>  
 11   
 12 static void sscanf_test(void);  
 13   
 14 static void sscanf_test(void)  
 15 {  
 16     int ret;  
 17     char *string;  
 18     int  digit;  
 19     char buf1[255];  
 20     char buf2[255];  
 21     char buf3[255];  
 22     char buf4[255];  
 23   
 24     /*1.最简单的用法*/  
 25     string = "china beijing 123";  
 26     ret = sscanf(string, "%s %s %d", buf1, buf2, &digit);  
 27     printf("1.string=%s\n", string);  
 28     printf("1.ret=%d, buf1=%s, buf2=%s, digit=%d\n\n", ret, buf1, buf2, digit);  
 29     /* 
 30     **执行结果: 
 31     **1.ret=3, buf1=china, buf2=beijing, digit=123 
 32     **可以看出,sscanf的返回值是读取的参数个数 
 33     */  
 34   
 35     /*2.取指定长度的字符串*/  
 36     string = "123456789";  
 37     sscanf(string, "%5s", buf1);  
 38     printf("2.string=%s\n", string);  
 39     printf("2.buf1=%s\n\n", buf1);  
 40     /* 
 41     **执行结果: 
 42     **2.buf1=12345 
 43     */  
 44   
 45     /*3.取到指定字符为止的字符串*/  
 46     string = "123/456";  
 47     sscanf(string, "%[^/]", buf1);  
 48     printf("3.string=%s\n", string);  
 49     printf("3.buf1=%s\n\n", buf1);  
 50     /* 
 51     **执行结果: 
 52     **3.buf1=123 
 53     */  
 54   
 55     /*4.取到指定字符集为止的字符串*/  
 56     string = "123abcABC";  
 57     sscanf(string, "%[^A-Z]", buf1);  
 58     printf("4.string=%s\n", string);  
 59     printf("4.buf1=%s\n\n", buf1);  
 60     /* 
 61     **执行结果: 
 62     **4.buf1=123abc 
 63     */  
 64   
 65     /*5.取仅包含指定字符集的字符串*/  
 66     string = "0123abcABC";  
 67     sscanf(string, "%[0-9]%[a-z]%[A-Z]", buf1, buf2, buf3);  
 68     printf("5.string=%s\n", string);  
 69     printf("5.buf1=%s, buf2=%s, buf3=%s\n\n", buf1, buf2, buf3);  
 70     /* 
 71     **执行结果: 
 72     **5.buf1=123, buf2=abc, buf3=ABC 
 73     */  
 74   
 75     /*6.获取指定字符中间的字符串*/  
 76     string = "ios<android>wp7";  
 77     sscanf(string, "%*[^<]<%[^>]", buf1);  
 78     printf("6.string=%s\n", string);  
 79     printf("6.buf1=%s\n\n", buf1);  
 80     /* 
 81     **执行结果: 
 82     **6.buf1=android 
 83     */  
 84   
 85     /*7.指定要跳过的字符串*/  
 86     string = "iosVSandroid";  
 87     sscanf(string, "%[a-z]VS%[a-z]", buf1, buf2);  
 88     printf("7.string=%s\n", string);  
 89     printf("7.buf1=%s, buf2=%s\n\n", buf1, buf2);  
 90     /* 
 91     **执行结果: 
 92     **7.buf1=ios, buf2=android 
 93     */  
 94   
 95     /*8.分割以某字符隔开的字符串*/  
 96     string = "android-iphone-wp7";  
 97     /* 
 98     **字符串取道\'-\'为止,后面还需要跟着分隔符\'-\', 
 99     **起到过滤作用,有点类似于第7点 
100     */  
101     sscanf(string, "%[^-]-%[^-]-%[^-]", buf1, buf2, buf3);  
102     printf("8.string=%s\n", string);  
103     printf("8.buf1=%s, buf2=%s, buf3=%s\n\n", buf1, buf2, buf3);  
104     /* 
105     **执行结果: 
106     **8.buf1=android, buf2=iphone, buf3=wp7 
107     */  
108   
109     /*9.提取邮箱地址*/  
110     string = "Email:beijing@sina.com.cn";  
111     sscanf(string, "%[^:]:%[^@]@%[^.].%s", buf1, buf2, buf3, buf4);  
112     printf("9.string=%s\n", string);  
113     printf("9.buf1=%s, buf2=%s, buf3=%s, buf4=%s\n\n", buf1, buf2, buf3, buf4);  
114     /* 
115     **执行结果: 
116     **9.buf1=Email, buf2=beijing, buf3=sina, buf4=com.cn 
117     */  
118   
119     /*10.过滤掉不想截取或不需要的字符串--补充, 
120     **在%号后面加一*号,代表过滤这个字符串,不读取 
121     */  
122     string = "android iphone wp7";  
123     sscanf(string, "%s %*s %s", buf1, buf2);  
124     printf("10.string=%s\n", string);  
125     printf("10.buf1=%s, buf2=%s\n\n", buf1, buf2);  
126     /* 
127     **执行结果: 
128     **10.android wp7 
129     */  
130 }  
131   
132 int main(int argc, char **argv)  
133 {  
134     sscanf_test();  
135       
136     return 0;  
137 }  
138   
139 /* 
140 **测试程序 
141 **环境: 
142 **Linux ubuntu 2.6.32-24-generic-pae #39-Ubuntu SMP Wed Jul 28 07:39:26 UTC 2010 i686 GNU/Linux 
143 **gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) 
144 ** 
145 gzshun@ubuntu:~/c/sscanf$ gcc sscanf.c -o sscanf 
146 gzshun@ubuntu:~/c/sscanf$ ./sscanf 
147 1.string=china beijing 123 
148 1.ret=3, buf1=china, buf2=beijing, digit=123 
149  
150 2.string=123456789 
151 2.buf1=12345 
152  
153 3.string=123/456 
154 3.buf1=123 
155  
156 4.string=123abcABC 
157 4.buf1=123abc 
158  
159 5.string=0123abcABC 
160 5.buf1=0123, buf2=abc, buf3=ABC 
161  
162 6.string=ios<android>wp7 
163 6.buf1=android 
164  
165 7.string=iosVSandroid 
166 7.buf1=ios, buf2=android 
167  
168 8.string=android-iphone-wp7 
169 8.buf1=android, buf2=iphone, buf3=wp7 
170  
171 9.string=Email:beijing@sina.com.cn 
172 9.buf1=Email, buf2=beijing, buf3=sina, buf4=com.cn 
173  
174 10.string=android iphone wp7 
175 10.buf1=android, buf2=wp7 
176 */