用C语言提取出.S19文件中长度、地址、数据和校验和，并计算出长度、地址和数据加和后按位取反的结果，再与校验和进行比较

好的，这是一个关于S19文件格式的问题，S19文件是一种十六进制记录文件格式，包含了程序代码和数据。其中每条记录包含长度、地址、类型、数据和校验和等信息。下面是提取长度、地址、数据和校验和的C语言示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define S19_RECORD_TYPE_DATA 0x01

typedef struct s19_record {
    int length;
    int address;
    int type;
    unsigned char *data;
    unsigned char checksum;
} s19_record_t;

void parse_s19_record(char *line, s19_record_t *record) {
    int len = strlen(line);
    if (len < 10) {
        return;
    }
    sscanf(line, "S%d%06X%02X", &record->length, &record->address, &record->type);
    record->data = (unsigned char*)malloc(sizeof(unsigned char) * (record->length - 3));
    int i;
    unsigned char csum = record->length + (record->address >> 8) + (record->address & 0xff) + record->type;
    for (i = 0; i < record->length - 3; i++) {
        sscanf(line + 8 + i * 2, "%02hhX", &record->data[i]);
        csum += record->data[i];
    }
    sscanf(line + len - 2, "%02hhX", &record->checksum);
    csum = ~csum;
    if (record->checksum != csum) {
        printf("Checksum error: %02X != %02X\n", record->checksum, csum);
    }
}

int main(int argc, char *argv[]) {
    if (argc < 2) {
        printf("Usage: %s <input_file>\n", argv[0]);
        return 1;
    }
    FILE *fp = fopen(argv[1], "r");
    if (!fp) {
        printf("Failed to open file %s\n", argv[1]);
        return 1;
    }
    char line[256];
    while (fgets(line, sizeof(line), fp)) {
        s19_record_t record;
        memset(&record, 0, sizeof(record));
        parse_s19_record(line, &record);
        if (record.type != S19_RECORD_TYPE_DATA) {
            continue;
        }
        printf("Length: %d, Address: %06X, Checksum: %02X\n", record.length, record.address, record.checksum);
        int i;
        unsigned char sum = 0;
        for (i = 0; i < record.length - 3; i++) {
            printf("%02X ", record.data[i]);
            sum += record.data[i];
        }
        printf("\n");
        sum += (record.address >> 8) + (record.address & 0xff) + record.length;
        sum = ~sum;
        if (record.checksum != sum) {
            printf("Checksum error: %02X != %02X\n", record.checksum, sum);
        }
        free(record.data);
    }
    fclose(fp);
    return 0;
}

这段代码可以读取S19文件中的每一条记录，提取出长度、地址、数据和校验和，然后计算出长度、地址和数据加和后按位取反的结果，再与校验和进行比较，如果不相等则输出错误信息。

注意：以上代码仅供参考，具体实现可能需要根据文件格式的具体要求进行修改。