missing terminating " character

Question

#include <stdio.h>
 
#define BIOS_CMOS_READ 0x1a
 
void main() {
    unsigned char status;
    unsigned char value;
    unsigned int ax;
 
    // 0x2a is the index of the hardware piece you want to read
    // For example, 0x00 is the equipment type, 0x08 is the CPU type
    unsigned char index = 0x2a; 
 
    // The BIOS interrupt is different on Linux and Windows
    #ifdef _WIN32

    #ifdef _WIN32
        __asm__ __volatile__ ("
             mov ax, BIOS_CMOS_READ
             mov esi, index
             mov edi, value
             int 0x15
             mov status, al
          ");
          #endif
    #else
        asm volatile (
            "movw   %%ax, %%dx\n\t"
            "movb   %1, %%al\n\t"
            "outb   %%al, $0x70\n\t"
            "inb    $0x71, %%al\n\t"
            "movb   %%al, %2\n\t"
            "movb   %%dl, %%al\n\t"
            : "=a" (ax), "=b" (value)
            : "0" (BIOS_CMOS_READ), "c" (index)
            : "edx"
        );
    #endif
 
    // Check the status byte
    if ((status & 0x80) == 0) {
        printf("Hardware information is not supported.\n");
    } else if ((status & 0x80) == 0x80 && (status & 0x40) == 0) {
        printf("CMOS battery is dead.\n");
    } else {
        // The value variable now contains the hardware information
        printf("Hardware information: 0x%02x\n", value);
    }
}

报错如图片

Answer 1

让阿豪来帮你解答，本回答参考chatgpt3.5编写提供，如果还有疑问可以评论或留言

根据图片提示信息，代码中缺少了一个宏定义的头文件，需要添加：

#include <asm/io.h>

在代码开头添加上述头文件即可解决报错。完整代码如下：

#include <stdio.h>
#include <asm/io.h>  // 添加该头文件
#define BIOS_CMOS_READ 0x1a
void main()
{
    unsigned char status;
    unsigned char value;
    unsigned int ax;
    unsigned char index = 0x2a;
#ifdef _WIN32
#ifdef _WIN32
    __asm__ __volatile__ (
        "mov ax, BIOS_CMOS_READ \n"
        "mov esi, index \n"
        "mov edi, value \n"
        "int 0x15 \n"
        "mov status, al \n"
    );
#else
    asm volatile (
        "movw   %%ax, %%dx\n\t"
        "movb   %1, %%al\n\t"
        "outb   %%al, $0x70\n\t"
        "inb    $0x71, %%al\n\t"
        "movb   %%al, %2\n\t"
        "movb   %%dl, %%al\n\t"
        : "=a" (ax)
        : "0" (BIOS_CMOS_READ), "c" (index), "b" (value)
        : "edx"
    );
#endif
    if ((status & 0x80) == 0) {
        printf("Hardware information is not supported.\n");
    }
    else if ((status & 0x80) == 0x80 && (status & 0x40) == 0) {
        printf("CMOS battery is dead.\n");
    }
    else {
        printf("Hardware information: 0x%02x\n", value);
    }
}