如何打印与密码相关的输出？

Question

在此代码中，我试图打印与个人识别码相关的数据。这意味着如果用户输入密码，则应打印该密码的数据。即使我在循环外打印数据，从另一个文件读取 pin 代码，它也会给我另一个文件 2000 我尝试了很多但失败了。

文件中的数据

Name,ID,Pin,Amount,Phone
Bilal Khan,1111111111111,1122,1000,1122334
Ali Ahmed,2222222222222,2233,2000,66778899

给定输出

1000
2000

预期输出

2000
Relevant to the Pin Code.

代码

#include <stdio.h>  
#include <string.h>
#include <stdlib.h>
#define STRING_LEN 200

int main(){  
  FILE *fp1 = fopen("file.csv", "r"); 
  char string[STRING_LEN];
  char * line = NULL, *pinFound = NULL, *wordOne = NULL, *wordTwo = NULL, *wordThree = NULL, *wordFour = NULL, *wordFive = NULL;  

  while(fgets(string, STRING_LEN, fp1)){
    line = strtok(string, "\n");
    pinFound = strstr(line, "2233");
    wordOne = strtok(line, ",");
    wordTwo = strtok(NULL, ",");
    wordThree = strtok(NULL, ",");
    wordFour = strtok(NULL, ",");
    wordFive = strtok(NULL, ",");
    if(pinFound)
      printf("%s\n", wordFour);
  }
}

Answer 1

你有这个输出是因为 strstr 在两行中找到了 2233。 Bilal Khan,1111111111111,1122,1000,1122334 包含 2233。对于此示例，您可以将 pinFound = strstr(line, "2233"); 替换为 pinFound = strstr(line, ",2233,"); 以进行测试，但正确的解决方案是使用正则表达式之类的东西。

如何打印与密码相关的输出？

How to print the output that is relevant to the pin code?

c

fgets