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part1

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野子Vito

#1 Created at ... [Delete] [Delete and Lock User]
'use strict';

function area_of_circle(r, pi) {

}
// 测试:
if (area_of_circle(2) === 12.56 && area_of_circle(2, 3.1416) === 12.5664) {
    alert('测试通过');
} else {
    alert('测试失败');
}

野子Vito

#2 Created at ... [Delete] [Delete and Lock User]
 'use strict';

function area_of_circle(r, pi) {
    if( pi == undefined)
      pi = 3.14;
   return r * r * pi;
}
// 测试:
if (area_of_circle(2) === 12.56 && area_of_circle(2, 3.1416) === 12.5664) {
    alert('测试通过');
} else {
    alert('测试失败');
}

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