C++ strcmp 数组

Question

我正在使用如下所示的 strcmp。

我正在调试值，哪些值相同，但仍未使该条件为真。

const char opcode_read[2] = {'0', '1'};

rc = recvfrom(s, blk_receive_full, sizeof (blk_receive_full), 0,(struct sockaddr FAR *)&sin, &fromlength);

if(rc == -1){
    printf("failed: recvfrom, \n No data received \n failed code: %d\n",WSAGetLastError());
    cleanup();
    exit(1);
}

memcpy(blk_receive_opcode, &blk_receive_full, 2);
if (strcmp(blk_receive_opcode, opcode_data) == 0) {
}

Answer 1

据我所知，您不是在比较两个字符串，因为它们不是以 null 结尾的。您可能想改用 memcmp():

if (memcmp(blk_receive_opcode, opcode_data, 2) == 0) {
}