echoBuffer[respStringLen] = '\0'; printf("Received:%s\n",echoBuffer);

echoBuffer[respStringLen] = '\0'; printf("Received:%s\n",echoBuffer);
echoBuffer[respStringLen] = '\0'; printf("Received:%s\n",echoBuffer);

echoBuffer[respStringLen] = '\0'; printf("Received:%s\n",echoBuffer);
就是给echoBuffer字符串的最后加一个字符串结束标志,然后把这个字符串打印出来而已.