linux c之把最简单的字符串数据追加写入文件

1 问题

把最简单的字符串数据追加写入文件

2 代码实现

      #include <stdio.h>
      #include <string.h>
      void write_data_to_file(const char *path, char *str)
      {
      	FILE *fd = fopen(path, "a+");
     	if (fd == NULL)
      	{
     		printf("fd is NULL and open file fail\n");
     		return;
      	}
     	printf("fd != NULL\n");
     	if (str && str[0] != 0)
      	{
      		fwrite(str, strlen(str), 1, fd);
     		char *next = "\n";
      		fwrite(next, strlen(next), 1, fd);
      	}
      	fclose(fd);
      }
      int main()
      {
     	char *path = "/home/chenyu/Desktop/linux/wf/c.txt";
     	char *str = "chenyu";
     	char *str1 = "hell word";
     	char *str2 = "write data to file";
      	write_data_to_file(path, str);
      	write_data_to_file(path, str1);
      	write_data_to_file(path, str2);
     	return 0;
      }
  
 

3 运行结果

      gcc -g write.c -o write
      ./write
      vim c.txt
      chenyu
      hell word
      write data to file
  
 

文章来源: chenyu.blog.csdn.net，作者：chen.yu，版权归原作者所有，如需转载，请联系作者。

原文链接：chenyu.blog.csdn.net/article/details/85266814