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