c - strtok 函数无法正常运行

Question

LOG.txt 文件:

2327 - Your account is created on 01/09/15 # 
2327 - Amount:100 withfrawed from your account on 01/09/15 #

此代码显示第一次编译时的输出和第二次编译时的其他输出。我犯了什么错误

#‎include‬<stdio.h>
#include<conio.h>
#include<string.h>
FILE *fp;

void main()
{
    int i=0;   
    char temp[10],log[10000],*token;
    char s1[2] = "#",s2[2] = "-",logger[100][70],no[100][10];
    clrscr();

    fp=fopen("LOG.TXT","r");

    while(fscanf(fp,"%s",temp)!=EOF)
    {
        strcat(log,temp);
        strcat(log," ");
    } 
    fclose(fp);
    printf("%s",log);
    token = strtok(log,s1);

    while(token!=NULL)
    {
        strcpy(logger[i],token);
        i++;
        token = strtok(NULL,s1);
    }

    i=0;
    token = strtok(logger[i],s2);
    while(token!=NULL)
    {
        strcpy(no[i],token);
        i++;
        token = strtok(logger[i],s2);
    }
    getch();
}

Answer 1

您的问题很可能在这里:

strcat(log,temp);
strcat(log," ");

您没有初始化log，这意味着内容不确定并且以这种方式使用log 会导致undefined behavior .

请记住，strcat 查找字符串终止符 '\0' 以了解它应该从何处开始追加，未初始化的局部非静态变量将具有看似随机的内容.