C語言對字串的一些操作

標籤：div   進位   move   class   span   i++   hex   字串   整數   

1. 字串中移除一個字元

 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. 字串轉為16進位整數

 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 }  

 

C語言對字串的一些操作