如何停止一次又一次地重复相同的数据？

Question

在这段代码中，我试图打印文件中除了我用身份证号码选择的行之外的剩余行。但是数据向我展示了结果 like

输出

data1....
Above are the remaining lines
data2....
Above are the remaining lines
data3....
Above are the remaining lines

我希望在打印完所有数据后在最后重复 Above are the remaining lines。

代码

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

int main(){
  FILE * fp1 = fopen("file.csv", "r");
  char string[200], toFind[200];
  char* lines = NULL;
  char* result = NULL; 

  printf("Enter your ID Card number: ");
  scanf("%s", toFind);

  while(fgets(string, 200, fp1)){
      lines = strtok(string, "\n");
      result = strstr(lines, toFind);

      if(!result){
         printf("%s\n", lines);
         printf("Above are the remaining lines\n");      
      }
  }    
   fclose(fp1);
 return 0; 
}

Answer 1

解决方法是将要打印的字符串放在while.

之外

为了完成，您可以使用 flag 仅打印 "Above are the remaining lines" 如果实际上还有剩余行：

Live demo

int flag = 0; //flag declaration

while (fgets(string, sizeof string, fp1)) { 
    //lines = strtok(string, "\n"); //this is doing nothing meaningful
    result = strstr(string, toFind); //use string instead
    if (!result)
    {
        printf("%s\n", string);
        if (!flag)
            flag = 1;
    }
}
if (flag)
    printf("Above are the remaining lines\n");

示例：

文件内容：

1234....
4567....
8910....

输入：

输出：

1234....
8910....
Above are the remaining lines

如何停止一次又一次地重复相同的数据？

How to stop repeating the same data again and again?

c

loops

repeat