计算输入的两个数相加(下面代码运行后并不现实结果)<script language="javascript" type="text/javascript">var a1=prompt("enter first number","");
var a2=prompt("enter second number","");var c=parseInt(a1);
var d=parseInt(a2);
var e=c+d;
documen.write("e is "+e);
</script>
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<script language="javascript" type="text/javascript">var a1=parseInt(prompt("enter first number",""));
var a2=parseInt(prompt("enter second number",""));var c=a1+a2;document.write(c);</script>这段代码正常。请问在转换输入的类型时按最上面写的为什么不能显示结果?
var a2=prompt("enter second number","");var c=parseInt(a1);
var d=parseInt(a2);
var e=c+d;
documen.write("e is "+e);
</script>
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<script language="javascript" type="text/javascript">var a1=parseInt(prompt("enter first number",""));
var a2=parseInt(prompt("enter second number",""));var c=a1+a2;document.write(c);</script>这段代码正常。请问在转换输入的类型时按最上面写的为什么不能显示结果?
<script language="javascript" type="text/javascript"> var a1=prompt("enter first number","");
var a2=prompt("enter second number",""); var c=parseInt(a1);
var d=parseInt(a2);
var e=c+d;
documen.write("e is "+e);
</script>