更新txt文件内容

时间:2015-01-04 14:45:06

标签: c file

所以我可以完成(不完全正确,但对我来说很好)来自名为 order.txt

的文件中的内容列表

该文件包含以下内容

假设我们当前时间 14:59

将Order.txt

  

FILE1.TXT; 5; 15:00

     

FILE2.TXT; 6; 15:01

     

file3.txt; 7; 15:02

     

FILE1.TXT; 2; 15:03

     

FILE1.TXT; 5; 15:05

     

FILE2.TXT; 2; 15:06

     

FILE1.TXT; 3; 15:07

基本上,“fileName”;“X秒列表”;“##开始列出:##”

该文件将打开,然后按照上面给出的顺序列出所有内容,直到它,没关系。

然而,现在我需要在使用时保存每个文件,包含它的总列表数,列出的总时间,以及是否有列表时间(基本上,如果它在订单中)。 txt文件)

例如,它应该是这样的:

used.txt

  

file1.txt; 4; 15; 1 (1 - 在order.txt中,0 - 它不是,我可以在完成此操作后执行此操作,当我删除它的时候它会改变)< /强>

     

FILE2.TXT; 2; 8; 1

     

file3.txt; 1; 7; 1

基本上,“fileName”;“totalTimeItAppears”;“totalSecondsItShows”;“IfItIsInOrder.txt”

并且,如果用户决定再次显示order.txt并且它仍然保持不变,当然,它需要再次更新并且将具有新值(在这种情况下将是上述的两倍)

used.txt

  

FILE1.TXT; 8; 30; 1

     

FILE2.TXT; 4; 16; 1

     

file3.txt; 2; 14; 1

我已经尝试过我的代码,但它只在第一次工作,并且可能只有两倍相同的值,在这种情况下,file1.txt显示4次,所以它可能不起作用,所以我删除了代码。我试图想出不同的方法,但无法想出正确地更新它。

这是我的代码,显示了order.txt:

        orderFile = fopen("order.txt","r");

        if(orderFile != NULL)
        {
            fseek(orderFile, 0, SEEK_END);
            size = ftell(orderFile);
            rewind(orderFile);

            if(size == 0)
            {
                printf("\n< No files to list >\n\n");
                fclose(orderFile);
            }
            else
            {
                while(fscanf(orderFile," %49[^;];%d; %49[^\n]\n",fileName,&seconds,timeValue) == 3)
                {
                    contentFile = fopen(fileName,"r");

                    if(contentFile != NULL)
                    {
                        sscanf(timeValue,"%d:%d",&hour,&min);
                        fseek(contentFile, 0, SEEK_END);
                        size = ftell(contentFile);
                        rewind(contentFile);

                        if(size == 0)
                        {
                            printf("\n< Scanned File has nothing to list >\n\n");
                            fclose(contentFile);
                        }
                        else
                        {
                            time_t now;
                            time(&now);

                            struct tm file_time_tm;
                            file_time_tm = *localtime(&now);
                            file_time_tm.tm_hour = hour;
                            file_time_tm.tm_min = min;
                            file_time_tm.tm_sec = 0;
                            file_time_tm.tm_isdst = -1;
                            time_t fileTime = mktime(&file_time_tm);

                            diff_time = difftime(fileTime, now);

                            if(diff_time > 0)
                            {
                                defaultFile = fopen("default.txt","r");
                                while(fscanf(defaultFile,"%[^\t]",defaultContent) == 1)
                                {
                                    printf("%s\n", defaultContent);
                                }
                                fclose(defaultFile);
                                sleep(diff_time);

                                while(fscanf(contentFile,"%[^\t]",textContent) == 1)
                                {
                                    printf("%s\n", textContent);
                                }
                                fclose(contentFile);
                                sleep(seconds);
                            }
                            else
                            {
                                if(diff_time < 0)
                                {
                                    diff_time2 = diff_time + 86400;

                                    defaultFile = fopen("default.txt","r");
                                    while(fscanf(defaultFile,"%[^\t]",defaultContent) == 1)
                                    {
                                        printf("%s\n", defaultContent);
                                    }
                                    fclose(defaultFile);
                                    sleep(diff_time2);

                                    while(fscanf(contentFile,"%[^\t]",textContent) == 1)
                                    {
                                        printf("%s\n", textContent);
                                    }
                                    fclose(contentFile);
                                    sleep(seconds);
                                }
                                else
                                {
                                    if(diff_time == 0)
                                    {
                                        while(fscanf(contentFile,"%[^\t]",textContent) == 1)
                                        {
                                            printf("%s\n", textContent);
                                        }
                                        fclose(contentFile);
                                        sleep(seconds);
                                    }
                                }
                            }
                        }
                    }
                    else
                    {
                        sscanf(timeValue,"%d:%d",&hour,&min);
                        printf("\n< File does not exist >\n\n");
                        fclose(contentFile);
                    }
                }

        fclose(orderFile);
            }
        }
        else
        {
            printf("\n< File does not exists, please create it again >\n\n");
            fclose(orderFile);
        }

        printf("\n");

我所知道的是,在睡眠(秒)之后我应该将它添加到 used.txt ,但我不知道如何只添加一次,如果还有另一个更新那行。我虽然使用“r +”所以它会写在该行的顶部,但在我的程序中我可以重命名文件,所以如果file1.txt将被重命名为file.txt,一个字符仍然存在,并且结局将是; 11(应该是1或0)。

在每次文件发生时正确更新时如何添加它?


到目前为止我已经尝试过了:

tempFile = fopen("temp.txt","w");
utilizadosFicheiro = fopen("utilizados.txt","r");

while(fscanf(utilizadosFicheiro," %49[^;];%d;%d;%d",ficheiroNome,&nApresentacao,&tempoAcumulado,&escalonamento) == 4)
{
  fseek(tempFile, 0, SEEK_END);
  size = ftell(tempFile);
  rewind(tempFile);

  if(size == 0)
  {
    fprintf(tempFile,"%s;%d;%d;%d\r\n",ficheiroNome,nApresentacao,tempoAcumulado,escalonamento);
  }
  else
  {

    while(fscanf(tempFile," %49[^;];%d;%d;%d",ficheiroNome2,&nApresentacao2,&tempoAcumulado2,&escalonamento2) == 4)
    {
      if(strcmp(ficheiroNome,ficheiroNome2) == 0)
      {
         // Edit the line with tempFile "r+"
      }
      else
      {
         // Keep line with tempFile "r"
         fprintf(tempFile,"%s;%d;%d;%d\r\n",ficheiroNome,nApresentacao,tempoAcumulado,escalonamento);
      }
    }
  }
}
  

ficheiroNome = fileName

     

nApresentacao = timesListedNumber

     

tempoAcumulado = totalSecondsListed

     

escalonamento =“time”(将为1或0)

1 个答案:

答案 0 :(得分:0)

使用代码回答可能更容易:

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

struct used_entry_s {
    char name[128];
    int num_occurances;
    int seconds_total;
    int in_order_flag;
};

struct order_entry_s {
    char name[128];
    int seconds;
    unsigned long long start;
};

/* first read from used.txt */
int read_entries(struct used_entry_s *entries) {
    FILE *f = fopen("used.txt", "r");
    struct used_entry_s entry;
    int ne = 0;

    if(!f) {
        return 0;
    }

    while(fscanf(f, "%[^;];%d;%d;%d\n", entry.name, &entry.num_occurances,
                &entry.seconds_total, &entry.in_order_flag) == 4) {
        memcpy(&entries[ne], &entry, sizeof(entry));
        ne++;
    }

    fclose(f);

    return ne;
}

/* save in-memory used entries to file, overwriting its contents */
void save_entries(const struct used_entry_s *entries, int num_entries) {
    int i;
    FILE *f = fopen("used.txt", "w");
    if(!f) {
        return;
    }

    for(i = 0; i != num_entries; ++i) {
        fprintf(f, "%s;%d;%d;%d\n", entries[i].name, entries[i].num_occurances,
                entries[i].seconds_total, entries[i].in_order_flag);
    }

    fclose(f);
}

/* update in-memory entries with given file */
int update_entries(const char *filename, struct used_entry_s *entries,
        int num_entries) {
    int ne = num_entries;
    FILE *f = fopen(filename, "r");
    char time_str[128];
    struct order_entry_s entry;

    if(!f) {
        return num_entries;
    }

    while(fscanf(f, "%[^;];%d;%[^\n]\n", entry.name, &entry.seconds, time_str) == 3) {
        /* maybe convert time_str to time_t here, I'm too lazy for that */

        int i;
        for(i = 0; i != ne; ++i) {
            if(strcmp(entries[i].name, entry.name) == 0) {
                /* got match, update it */
                entries[i].seconds_total += entry.seconds;
                entries[i].num_occurances++;
                break;
            }
        }

        if(i == ne) {
            /* no match found - add new one */

            strcpy(entries[ne].name, entry.name);
            entries[ne].num_occurances = 1;
            entries[ne].seconds_total += entry.seconds;
            entries[ne].in_order_flag = 1;

            /* increase number of entries */
            ne++;
        }
    }

    fclose(f);

    return ne;
}


int main(int argc, char **argv) {
    /* maximum number of entries in used.txt */
#define MAX_USED_ENTRIES 128
    struct used_entry_s used_entries[MAX_USED_ENTRIES];
    int num_entries = read_entries(used_entries);

    num_entries = update_entries("order.txt", used_entries, num_entries);
    num_entries = update_entries("order.txt", used_entries, num_entries);

    save_entries(used_entries, num_entries);

    return 0;
}

它依赖于MAX_USED_ENTRIES作为常量,并且永远不会检查溢出。如果需要,这可以改进,但这不是问题的主题。