Var num=100
For (var I=1; I & lt;=Infinity; I++) {
Var text=prompt (" please input you want to operate: \ n 1. Save \ n (2) draw money \ n 3. \ n show balance 4. Exit ')
If (parseInt (text)==1) {
Var cunnum=prompt (" please enter the amount: ')
Num +=parseInt (cunnum)
Alert (' you has a balance of: '+ num);
continue;
} else if (parseInt (text)==2) {
Var qunum=prompt (" please enter the amount you want to access: ');
If (parseInt (qunum) & gt; Num) {
Alert (' sorry, insufficient balance);
continue;
}
Num=qunum;

Alert (' you has a balance of: '+ num)
continue;
} else if (parseInt (text)==3) {
Alert (' you has a balance of: '+ num)
continue;
} else if (parseInt (text)==4) {
break;
} else {
Alert (' I ')
}
}

CodePudding user response:

The code is not complete,,,,,,,,,

CodePudding user response:

Var text=prompt (" please input you want to operate: \ n 1. Save \ n (2) draw money \ n 3. \ n show balance 4. Exit ')
Why write cycle in?? Every time you want to hint at a time??
Don't have to use text directly with parseInt=="1"

CodePudding user response:

Functionality is ok, then I also imitate a

 
Let money=100//initial amount 
SetTimeout ()=& gt; {//wait 1 seconds began to perform 
For (;; ) {//no input conditions to enter an infinite loop 
Let inputData=https://bbs.csdn.net/topics/getInput (" please input you want to operate: \ n 1. Save \ n (2) draw money \ n 3. \ n show balance 4. Exit ') 
//by getting input method to extract data 
The switch (inputData) {
Case 1: 
Let setMoney=parseInt (prompt (' please enter the access amount:)) 
Money +=setMoney 
AlertBalances () 
break; 
Case 2: 
Let getMoney=parseInt (prompt (" please enter the amount you want to access: ')) 
If (getMoney & gt; Money) {
Alert (' sorry, insufficient balance ') 
Break 
} 
Money -=getMoney 
AlertBalances () 
break; 
Case 3: 
AlertBalances () 
break; 
Case 4: 
Alert (' exit 'success) 
Return 
break; 
Default: 
Alert (' I ') 
break; 
} 
} 

}, 1000) 
The function getInput (MSG) {
Let the input=prompt (MSG | | 'please enter the content') 
If (input) {
Input=input. Replace (\ D/g, ' ') 
//regular excluding non-numeric parameters 
} else {//if you click cancel, enter a null value, or 0 
Input=0 
} 
The return Number (input)//make sure return parameter for Number type 
} 
The function alertBalances () {//tip the balance function 
Alert (` your balance is ${money} `) 
} 

1. An infinite loop can be used for (;; {} {}) or the while (1) to implement
2. Specification of follow-up with clear variables use
3. The more the if () else if () can be used to switcch () {case} instead of better performance, the written clearer
4. Repeat the function or method for out package convenient unified maintenance
5. Reduce duplication of code

CodePudding user response:

If is an infinite loop, it is better to use a while loop,
Suitable For limited cycle For loop, such as walking down group,

Judgment, with switch beyond constant-like than if the else better readability,

Is the continue to skip the following statement, to begin a new cycle, here also was not used, because behind the if no other statements, so you can delete,

CodePudding user response:

Thank you for your bosses to give directions! A personal learning feeling a bit behind closed doors,