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MSilva95 5 years ago
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## foldint
## **WARNING! VERY IMPORTANT!**
For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program:
This means that:
- The package needs to be named `package main`.
- The submitted code needs one declared function main(```func main()```) even if empty.
- The function main declared needs to **also pass** the `Restrictions Checker\`(illegal functions tester). It is advised for the student to just empty the function main after its own testings are done.
- Every other rules are obviously the same than for a `program`.
### Instructions
Write a function called `FoldInt` that simulates the behavior of reduce from JavaScript.
The function should have as parameters a function, `f func(int, int) int` a slice of integers, `slice []int` and an int `acc int`. You should apply for each element of the slice the arithmetic function, saving and printing it. The function will be tested with our own functions `Add, Sub, and Mul`.
### Expected function
```go
func FoldInt(f func(int, int) int, slice []int, acc int) {
}
```
### Usage
Here is a possible program to test your function:
```go
package main
func main() {
table := []int{1, 2, 3}
ac := 93
FoldInt(Add, table, ac)
FoldInt(Mul, table, ac)
FoldInt(Sub, table, ac)
fmt.Println()
table = []int{0}
FoldInt(Add, table, ac)
FoldInt(Mul, table, ac)
FoldInt(Sub, table, ac)
}
```
And its output :
```console
student@ubuntu:~/[[ROOT]]/test$ go build
student@ubuntu:~/[[ROOT]]/test$ ./test
99
558
87
93
0
93
student@ubuntu:~/[[ROOT]]/test$
```
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