47 lines
791 B
Go
47 lines
791 B
Go
package main
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import (
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"fmt"
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"sync"
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)
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func main() {
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var balance int = 100
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// var mu sync.Mutex
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fmt.Println("Initial balance:", balance)
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// Apply concurrent adjustments to the balance.
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// The sum of these adjustments is 0.
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// We should see no changes in balance at the end.
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var adjustments = []int{
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-8, -4, -2, 0, 2, 4, 8,
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-8, -4, -2, 0, 2, 4, 8,
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-8, -4, -2, 0, 2, 4, 8,
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-8, -4, -2, 0, 2, 4, 8,
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-8, -4, -2, 0, 2, 4, 8,
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-8, -4, -2, 0, 2, 4, 8,
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}
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var wg sync.WaitGroup
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wg.Add(len(adjustments))
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for _, adjustment := range adjustments {
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// go = placed onto thread, not the stack.
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go func(adjustment int) {
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defer wg.Done()
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// mu.Lock()
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balance += adjustment
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// mu.Unlock()
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}(adjustment)
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}
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wg.Wait()
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fmt.Println("Final balance:", balance)
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}
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