网页计算器

Posted on | 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
<html>
<body>
<div id="calculator">
    <div class="LOGO">
        <span class="name">简单的计算器</span>
        <span class="verson">@walker</span>
    </div>
    <div id="shuRu">
        <!--screen输入栏-->
        <div class="screen">
            <input type="text" id="screenName" name="screenName" class="screen">
        </div>
    </div>
    <div id="keys">
        <!-- j -->
        <!--第一排-->
        <input type="button" id="7" onclick="jsq(this.id)" value="7" class="buttons">
        <input type="button" id="8" onclick="jsq(this.id)" value="8" class="buttons">
        <input type="button" id="9" onclick="jsq(this.id)" value="9" class="buttons">
        <input type="button" id="Back" onclick="tuiGe()" value="Back" class="buttons">
        <input type="button" id="C" onclick="clearNum()" value="C" class="buttons" style="margin-right:0px">
        <!--第二排-->
        <input type="button" id="4" onclick="jsq(this.id)" value="4" class="buttons">
        <input type="button" id="5" onclick="jsq(this.id)" value="5" class="buttons">
        <input type="button" id="6" onclick="jsq(this.id)" value="6" class="buttons">
        <input type="button" id="*" onclick="jsq(this.id)" value="X" class="buttons">
        <input type="button" id="/" onclick="jsq(this.id)" value="/" class="buttons" style="margin-right:0px">
        <!--第三排-->
        <input type="button" id="1" onclick="jsq(this.id)" value="1" class="buttons">
        <input type="button" id="2" onclick="jsq(this.id)" value="2" class="buttons">
        <input type="button" id="3" onclick="jsq(this.id)" value="3" class="buttons">
        <input type="button" id="+" onclick="jsq(this.id)" value="+" class="buttons">
        <input type="button" id="-" onclick="jsq(this.id)" value="-" class="buttons" style="margin-right:0px">
        <!--第四排-->
        <input type="button" id="0" onclick="jsq(this.id)" value="0" class="buttons">
        <input type="button" id="00" onclick="jsq(this.id)" value="00" class="buttons">
        <input type="button" id="." onclick="jsq(this.id)" value="." class="buttons">
        <input type="button" id="%" onclick="jsq(this.id)" value="%" class="buttons">
        <input type="button" id="eva" onclick="eva()" value="=" class="buttons" style="margin-right:0px">
    </div>
    <div class="footer">
        <span class="aside">欢迎使用JavaScript计算器</span>
            <span class="link">
                <a href="#" title="声明" target="_blank">反馈</a>
            </span>
    </div>
</div>





<script>

  var num = 0;  // 定义第一个输入的数据
          function jsq(num) {
              //获取当前输入
              if(num=="%"){
                  document.getElementById('screenName').value=Math.round(document.getElementById('screenName').value)/100;
              }else{
                  document.getElementById('screenName').value += document.getElementById(num).value;
              }
          }
          function eva() {
              //计算输入结果
              document.getElementById("screenName").value = eval(document.getElementById("screenName").value);
          }
          function clearNum() {
              //清0
              document.getElementById("screenName").value = null;
              document.getElementById("screenName").focus();
          }
          function tuiGe() {
              //退格
              var arr = document.getElementById("screenName");
              arr.value = arr.value.substring(0, arr.value.length - 1);
          }
</script>

<style>
/*Basic reset*/
*{
    margin:0;
    padding:0;
    box-sizing: border-box;
    font:  14px Arial,sans-serif;
}
html{
    height:100%;
    background-color:lightslategrey;
}

#calculator{
    margin: 15px auto;
    width:330px;
    height:400px;
    border: 1px solid lightgray;
    background-color:darkgrey;
    padding:15px;
}

/*LOGO*/
.LOGO{
    height:20px;

}
.LOGO .name{
    float:left;
    line-height:30px;
}
.LOGO .verson{
    float:right;
    line-height:30px;
}
/*screen*/
#shuRu{
    margin-top:15px;
}
.screen{
    margin-top:5px;
    width:300px;
    height:40px;
    text-align: right;
    padding-right:10px;
    font-size:20px;
}
#keys{
    border:1px solid lightgray;
    height:223px;
    margin-top:25px;
    padding:8px;
}
#keys .last{
    margin-right:0px;
}
.footer{
    margin-top:20px;
    height:20px;
}
.footer .link{
    float:right;
}

#keys .buttons{
    float:left;
    width: 42px;
    height: 36px;
    text-align:center;
    background-color:lightgray;
    margin: 0 17px 20px 0;
}
</style>


</body>
</html>