├── README.md
├── cpp
    └── main.cpp
└── js
    └── main.js


/README.md:
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1 | # arithmetic-progression
2 | arithmetic-progression with js, cpp
3 | 


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/cpp/main.cpp:
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 1 | #include <bits/stdc++.h>
 2 | 
 3 | using namespace std;
 4 | 
 5 | int main()
 6 | {
 7 |     double x,y,i;
 8 |     cin>>x>>y;
 9 |     i=(x+y)/2;
10 |     cout<<setprecision(1)<<fixed<<i;
11 | 
12 |     return 0;
13 | }
14 | 


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/js/main.js:
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 1 | let firstInput = document.getElementById("f");
 2 | let secondInput = document.getElementById("s");
 3 | let button = document.getElementById("b");
 4 | let paragraph = document.getElementById("demo");
 5 | 
 6 | button.addEventListener("click", () => {
 7 |   let LENGTH = 0;
 8 |   let _LOOP = 0;
 9 |   let _EQUAL = 1;
10 |   const msg = ["Please enter a input", "system error", "this is dummie number"];
11 |   let structure = [firstInput.value, secondInput.value];
12 |   if (!structure[LENGTH] && !structure[_EQUAL]) {
13 |     structure.map((i) => {
14 |       if (i != "") {
15 |         console.log("structure is working");
16 |       }
17 |     });
18 |     while (_LOOP <= structure[LENGTH]) {
19 |       for (let _i = _LOOP; _i <= structure[LENGTH]; _i++) {
20 |         if (_LOOP == structure[LENGTH]) {
21 |           let _k = _LOOP + _EQUAL;
22 |           alert(msg[(LENGTH = _k - _EQUAL)]);
23 |         }
24 |       }
25 |       _LOOP++;
26 |     }
27 |   } else {
28 |     if (!structure[_EQUAL]) {
29 |       alert(msg[LENGTH]);
30 |     } else {
31 |       if (_LOOP != LENGTH && LENGTH != LENGTH) {
32 |         console.log(msg[_EQUAL]);
33 |       } else {
34 |         if (structure[LENGTH] <= LENGTH || structure[_EQUAL] <= LENGTH) {
35 |           if (msg[2]) alert(msg[2]);
36 |         } else {
37 |           let _LENGTH_INPUT = 2;
38 |           let _l = (+structure[LENGTH] + +structure[_EQUAL]) / _LENGTH_INPUT;
39 |           paragraph.innerHTML = _l;
40 |           console.log(_l);
41 |         }
42 |       }
43 |     }
44 |   }
45 | });
46 | 


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