回答此问题可获得 20 贡献值,回答如果被采纳可获得 50 分。
<p>我有一个包含如下数据的.txt文件:</p>
<pre><code>0,Rent1,Expense,16/02/2010,1,4000,4000
0,Car Loan1,Expense,16/02/2010,2,4500,9000
0,Flat Loan1,Expense,16/02/2010,2,4000,8000
0,Rent2,Expense,16/02/2010,1,4000,4000
0,Car Loan2,Expense,16/02/2010,2,4500,9000
0,Flat Loan2,Expense,16/02/2010,2,4000,8000
</code></pre>
<p>现在我想用以下新项目替换第4行:</p>
<p>0,贷款,费用,2010年2月19日,2500010000</p>
<p>我使用以下代码:</p>
^{pr2}$
<p>但它显示的文件如下:</p>
<pre><code>0,Rent1,Expense,16/02/2010,1,4000,4000
0,Car Loan1,Expense,16/02/2010,2,4500,9000
0,Flat Loan1,Expense,16/02/2010,2,4000,8000
0,Loan,Expense,19/02/2010,2,5000,100000,Car Loan2,Expense,16/02/2010,2,4500,9000
0,Flat Loan2,Expense,16/02/2010,2,4000,8000
</code></pre>
<p>我怎么解决这个问题?在</p>