var arr = []; var sum = 0; for (var i = 0; i < 7; i++) { sum += arr[i] = parseFloat(prompt("请输入第"+(i+1)+"门功课成绩:",0)); } alert("总成绩:"+sum); alert("平均分:"+sum/7); var str = ""; arr.forEach(function(v, i){ if (v<60) str += "\n第"+(i+1)+"门功课:"+v; }); alert("不及格的成绩:"+str);
var arr = [];
var sum = 0;
for (var i = 0; i < 7; i++) {
sum += arr[i] = parseFloat(prompt("请输入第"+(i+1)+"门功课成绩:",0));
}
alert("总成绩:"+sum);
alert("平均分:"+sum/7);
var str = "";
arr.forEach(function(v, i){
if (v<60)
str += "\n第"+(i+1)+"门功课:"+v;
});
alert("不及格的成绩:"+str);