<!doctype html><html><head><meta charset="utf-8"><title>JS語法練習(xí)3</title><script> var amount = 0; function bankSystem(behavior,number){ if(behavior="save"){amount=amount+number;return amount;} if(behavior="withdraw"){amount=amount-number;return amount;} } function checkAmount(){ document.write(amount+"<br>"); } bankSystem("save",1000); checkAmount(); bankSystem("withdraw",300); checkAmount(); bankSystem("withdraw",850); checkAmount(); bankSystem("save",700); checkAmount(); bankSystem("withdraw",60); checkAmount(); bankSystem("save",100); bankSystem("save",200); bankSystem("withdraw",1000); bankSystem("save",500); bankSystem("withdraw",200); checkAmount(); </script></head><body></body></html>
這個代碼哪里錯了，為什么不能減？
id路人
2016-09-12 22:11:51
