C语言对字符串的一些操作

1. 字符串中移除一个字符

 1 void removeChar(char *str, char c) 
 2 {
 3     char *s = str;
 4     int j, k;
 5 
 6     for(j=k=0; s[j]!='\0'; j++) {
 7         if(s[j]!=c)
 8             s[k++]=s[j];
 9     }
10 
11     s[k]= '\0';
12 }

2. 字符串转为16进制整数

 1 unsigned int StrToHex(char *pszSrc, int nLen)  
 2 {  
 3     char h1, h2;  
 4     char s1, s2; 
 5     unsigned char pbDest;
 6     unsigned int ret = 0;
 7 
 8     //printf("%s, src: %s\n", __FUNCTION__, pszSrc);
 9 
10     for (int i = 0; i < nLen; i++)  
11     {  
12             h1 = pszSrc[2 * i];  
13             h2 = pszSrc[2 * i + 1];  
14       
15             s1 = toupper(h1) - 0x30;  
16             if (s1 > 9)  
17                 s1 -= 7;  
18       
19             s2 = toupper(h2) - 0x30;  
20             if (s2 > 9)  
21                 s2 -= 7;  
22             pbDest = s1 * 16 + s2;  
23             //printf("h1: 0x%02x, h2: 0x%02x, s1: 0x%02x, s2: 0x%02x, dst: 0x%x\n", h1, h2, s1, s2, pbDest);  
24 
25             ret = (ret << 8) + pbDest;
26             //printf("ret: 0x%x\n", ret);
27     }  
28 
29     return ret;
30 }