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
./writevim c.txtchenyu
hell word
write data to file