//要求:累加含有两位小数点的数据
var numbs = ['545.6','172.95','936.93','200','43.2','202.65','8573.9','171.92','72.69',
'280','662.11','12.6'];
//出错方法:
var amount = 0;
for(var i = 0;i < 12;i++){
amount += parseFloat(numbs[i]);
}
console.log("直接使用parseFloat计算结果:"+amount);//11874.550000000001
//方案一:通过parseFloat累计,然后再使用toFixed进行四舍五入
var amount1 = 0;
for(var i = 0;i < 12;i++){
amount1 += parseFloat(numbs[i]);
}
console.log("toFixed计算结果:"+amount1.toFixed(2));//11874.55
//方案二:通过乘以100,再除以100.这样可以将var类型转换成number类型
var amount2 = 0;
for(var i = 0;i < 12;i++){
amount2 += numbs[i] * 100;
}
amount2 = amount2 / 100;
console.log("*100/100计算结果:" + amount2);//11874.55
</script>
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