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Failed to run the same program with CMD terminal while with GolLand it works fine. #33827

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shipherd opened this issue Aug 25, 2019 · 2 comments

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@shipherd
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commented Aug 25, 2019

Environment: Go version: go1.12.9 windows/amd64, Windows 10 1903, GoLand Version: 2019.2

Code File:
c.txt

This program gets input from stdin.
The first input indicates how many groups of numbers.
The second input is also a number, which means how many numbers in the first group.
The third input can be a string of numbers, separated by space. These are all the numbers in the first group.
By repeating the second and third steps, we can input multi-groups of numbers.
The output is the square sums (all the negative numbers are ignored) of the numbers in each group.

e.g.
inputs:
2 //2 Groups
2 //2 Numbers in the first group
1 2 //First group
1 //1 Number in the second group
4// Second Group
outputs:
5 //11+22
16//4*4

Issue:

Here is the intended result from GoLand:
inputs:
2
1
-1
1
1
outputs:
0
1

But from the CMD terminal:

C:\Users\Vic\Desktop\challenge>go run c.go
2
1
-1
panic: runtime error: index out of range

goroutine 1 [running]:
main.IterElements(0xfffffffffffffffe, 0xc0000402b0, 0x0, 0x0, 0xc00005c420)
C:/Users/Vic/Desktop/challenge/c.go:22 +0x13a
main.IterElements(0xffffffffffffffff, 0xc0000402b0, 0x1, 0x1, 0x0)
C:/Users/Vic/Desktop/challenge/c.go:33 +0x105
main.iterGroups(0x1)
C:/Users/Vic/Desktop/challenge/c.go:45 +0x11e
main.iterGroups(0x2)
C:/Users/Vic/Desktop/challenge/c.go:49 +0x163
main.main()
C:/Users/Vic/Desktop/challenge/c.go:67 +0xba
exit status 2

Not sure what is wrong here, any help?

Thank you!

@bcmills

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commented Aug 26, 2019

Your readLine function buffers an unspecified quantity of input from os.Stdin, then returns the first line of that input — discarding the remainder. It most likely displays different results in the two environments due to a different pattern of writes to stdin.

@bcmills

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commented Aug 26, 2019

This issue seems to be a question about how to use Go, rather than a feature request or defect report about the Go language and/or toolchain.

We have decided that our experiment to allow questions on the issue tracker has not had the outcome we desired, so I am closing this issue. I'm sorry that we can't answer your question here.

There are many other methods to get help if you're still looking for answers:

Thanks

@bcmills bcmills closed this Aug 26, 2019

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