我试图根据标签将输入数据文件分成两个输出文件。下面是我的代码。下面的代码仅适用于较少数量的记录,但如果记录数量过多,则会出现段错误。行。
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main(int argc,char *argv[])
{
FILE *fp,*fp1,*fp2,*fp3;
char *filename,line[80],line1[80];
char *token,*token1,mystr[10];
filename=(char *)argv[1];
fp=fopen(filename,"r");
if(fp ==NULL) //Checking whether the command line argument was correctly or not.
printf("There is no such file in the directory.\n");
if(remove("sales_ok_fraud.txt") != 0) //Checking for file existence.
perror("Error in deleting the file.\n");
else
printf("The existing cleansed data file is successfully deleted.\n");
if(remove("sales_unknwn.txt") != 0) //Checking for file existence.
perror("Error in deleting the file.\n");
else
printf("The existing cleansed data file is successfully deleted.\n");
while(fgets(line,80,fp)!=NULL) //Reading each line from file to calculate the file size.
{
strcpy(line1,line);
token = strtok(line,",");
token = strtok(NULL,",");
token = strtok(NULL,",");
token = strtok(NULL,",");
token = strtok(NULL,",");
token = strtok(NULL,",");
token1 = strtok(token,"\n");
memcpy(mystr,&token1[0],strlen(token1)-1);
mystr[strlen(token1)-1] = '\0';
if( strcmp(mystr,"ok") == 0 )
{
fp1=fopen("sales_ok_fraud.txt","a");//Opening the file in append mode.
fprintf(fp1,"%s",line1);//Writing into the file.
fclose(fp2);//Closing the file.
//printf("Inside ok - %s\n",mystr);
}
else if( strcmp(mystr,"fraud") == 0)
{
fp2=fopen("sales_ok_fraud.txt","a");//Opening the file in append mode.
fprintf(fp2,"%s",line1);//Writing into the file.
fclose(fp2);//Closing the file.
//printf("Inside fraud - %s\n",mystr);
}
else
{
fp3=fopen("sales_unknwn.txt","a");//Opening the file in append mode.
fprintf(fp3,"%s",line1);//Writing into the file.
fclose(fp3);//Closing the file.
//printf("This is unknown record.\n");
}
}
fclose(fp);
return 0;
}
最佳答案
我在您的代码中发现了一些问题,首先strlen
返回字符串的长度不包括空字节,因此您不需要-1
(这就是为什么它可能不匹配任何 strcmp
的原因)
memcpy(mystr, &token1[0], strlen(token1));
mystr[strlen(token1)] = '\0';
在这里我认为你应该关闭fp1
fp1=fopen("sales_ok_fraud.txt","a"); //you open f1
fprintf(fp1,"%s",line1); //you write
fclose(fp2);//Closing the file. //you close fp2
注意:您应该确保 token1
不会溢出 mystr
。
关于c - 如何将一个文件拆分为两个文件以获取 400k 记录,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13421438/