将16进制数据输出到控制台textout错误的---

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// 将16进制数据输出到控制台 void textout(char * name, unsigned char * p, unsigned short len) {     char * pp;     unsigned short i;     pp = (char*) malloc(1024);     for (i = 0; i<1024; i++)pp[i] = 0;     //  len=strlen(p);     for (i = 0; i<len; i++)         sprintf(pp + i * 2, "%02x", p[i]);     sprintf(pp + i * 2, "\n\r");     printf("%s",name);       free(pp); } unsigned char toByte(char c) {     unsigned char value = 0;       if (c >= '0' && c <= '9')         value = c - '0';     else if (c >= 'A' && c <= 'Z')         value = c - 'A' + 10;     else if (c >= 'a' && c <= 'z')         value = c - 'a' + 10;       return value; }   void hexStringToByte(unsigned char *dstByte, const char *srcHexString, int len) {     int index;       for (int i = 0; i < len; i++){         index = i * 2;         dstByte[i] = ((toByte(srcHexString[index])) << 4) | toByte(srcHexString[index + 1]);     } } int main() {     char tmp[10];     unsigned char t_buf[1024];              // 发送报文缓冲区     hexStringToByte(t_buf, "abcd1234", 8);     textout(tmp, t_buf, 8);     system("PAUSE");     return 0;     }