1、錯誤描述
![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsISPrdEZwZ1Rh5WNXp1bwNjW1ZUba9VZwlHdsATOfd3bkFGazxCMx8VesATMfhHLlN3XnxCMwEzX0xiRGZkRGZ0Xy9GbvNGLpZTY1EmMZVDUSFTU4VFRR9Fd4VGdsYTMfVmepNHLrJXYtJXZ0F2dvwVZnFWbp1zczV2YvJHctM3cv1Ce-cmbw5COwMWZzMDZiFTMyAjNmBTMxEmY5cTN1gzYzkDO1IGZ48CX0AzLchDMxIDMy8CXn9Gbi9CXzV2Zh1WavwVbvNmLvR3YxUjL3M3Lc9CX6MHc0RHaiojIsJye.png)
var app = require('fs');
var buf = new Buffer('我愛你,程式設計!');
app.open('you.txt','wx',function(err,fd){
app.write(fd,buf,0,15,0,function(err,written,buffer){
if(err)
console.log("寫入檔案失敗");
else
console.log("寫入檔案成功");
app.close(fd);
});
});
第一個參數必須是檔案描述符