Help Debug Stoney L's CPP Code...

[Stoney L]

Could anyone tell me what's happening?I wrote:

#include<bits/stdc++.h>
using namespace std;
int days,gold,silver,copper,all,sum,sumg,sums,sumc;
int main(){
    days<=17;
    cin>>days;
    for(int i;i<=days;i++;){
        cin>>gold>>silver>>copper;
        sumg=gold+sumg;
        sums=silver+sums;
        sumc=copper+sumc;
        sum=sumg+sums+sumc;
    }
    cout<<days<<" "<<sumg<<" "<<sums<<" "<<sumc<<" "<<sum;
    return 0;
}

And it says:
C:\Documents and Settings\Administrator\My Documents\Untitled1.cpp In function 'int main()':
7 23 C:\Documents and Settings\Administrator\My Documents\Untitled1.cpp [Error] expected ')' before ';' token
7 24 C:\Documents and Settings\Administrator\My Documents\Untitled1.cpp [Error] expected primary-expression before ')' token
7 24 C:\Documents and Settings\Administrator\My Documents\Untitled1.cpp [Error] expected ';' before ')' token
Why does this happened?
Tips:please send it before 2022/5/28, because that day is my coding class, I need to finish this question before the class.

[dev7060]

days<=17;

<= is a relational operator.

for(int i;i<=days;i++;){

There should be no semicolon after the update expression. What is the initial value of i?

[zmbd]

@dev7060 - thank you for such a quick reply
Unfortunately, Stoney hasn't returned since the post was made - for those that follow, it's really rude to say something is urgent with a deadline, in this case 2022-05-28, (as I write this it is 2022-05-28-19H10-UTC) and then not return.

For those that follow:
+First problem is on line 5 days<=17;, as dev7060 pointed out, this is a conditional comparison. One can only guess that OP intended for the loop that follows to have 17 itterations; therefore, the code is corrected to days=17;
(My personal preference is to never use "day" or "days" as a variable name in that these are often reserved keywords - IMNSHO one should use something like "myDay" or "varDay" etc... i tend to use things like "zDay" or "z_Day"
+

7 23 C:\Documents and Settings\Administrator\My Documents\Untitled1.cpp [Error] expected ')' before ';' token

(the remaining errors are related to this one) indicates that there is a syntax error on line 7 position 23 for(int i;i<=days;i++;). One can only guess that this was a typo as the code could be for(int i;i<=days;i++); infact that trailing semicolin could be omitted (at least in VS2019IDE) (yes, there are other issues here)!

+Correcting this to for(int i;i<=days;i++) creates an infinite loop in that the conditional will always be true in that the variable was set to a null value which will not (in/de)-crement. So let's correct that issue with for (int i = 1; i <= days; i++)

+ So now the code will compile in the debugger and run... wait for it... ; HOWEVER, there are a few improvements.
As written this code is user and compiler unfriendly! When I took my CompSci courses (ages ago, dinosaurs walked the Earth!) we were graded on three points: does the code meet the project rubric, is the code compiler friendly (does not include things that are not needed); is the user feed-back human friendly (could someone execute the program and know what to do during interaction)
> Lets take care of the compiler unfriendly
#include <stdc++.h> includes a lot of stuff that simply isn't needed in this code. All that is needed is #include <iostream>
As for the user unfriendly - break that huge cin appart and instert a few prompts, some user message, format the output a bit and you get something like:

#include <iostream>
using namespace std;
int z_days, z_gold, z_silver, z_copper, z_all, z_sum, z_sumg, z_sums, z_sumc;
//
int main()
{
    z_days = 17;
    cout << "How Much: gold, silver, copper (press enter after each entry)" << endl;
    for (int i = 1; i <= z_days; i++) {
        cout << "Day " << i << " of " << z_days << endl;
        cout << "Gold?  ";
        cin >> z_gold;
        cout << "Silver? ";
        cin >> z_silver;
        cout << "Copper ";
        cin >> z_copper;
        cout << "---------------- " << endl;
        z_sumg = z_gold + z_sumg;
        z_sums = z_silver + z_sums;
        z_sumc = z_copper + z_sumc;
        z_sum = z_sumg + z_sums + z_sumc;
    }
    cout << "---------------- " << endl << "Days:" << z_days << "; SumG:" << z_sumg << "; SumS:" << z_sums << "; SumC:" << z_sumc << "; Total:" << z_sum << endl;
    return 0;
}

with an output (for 3 days...):

How Much: gold, silver, copper (press enter after each entry)
Day 1 of 3
Gold?  1
Silver? 2
Copper 3
----------------
Day 2 of 3
Gold?  4
Silver? 5
Copper 6
----------------
Day 3 of 3
Gold?  7
Silver? 8
Copper 9
----------------
----------------
Days:3; SumG:12; SumS:15; SumC:18; Total:45

[Stoney L]

@zmbd:I haven't return? […]

[zmbd]

Stoney

At the time of my post you had not logged into your account. As a moderator I can see when you have logged into your account amongst other stats

You posted an “urgent” request for help with a drop-dead date of BEFORE May28th. Dev7060 posted a timely reply - good manners would be to sign in and thank the person for their help - you did not as of the close of normal business on the 28th

There you have it