Reference no: EM133368683
Question: Write a Go program to do the following:
Reads problems from STDIN as a list of positive integers separated by whitespace, one problem per line.
Output a solution to the problem to STDOUT that makes the equation valid. Each +, -, *, /, and = must be passed by one space on each side.
If no solution is found simply output a blank line to STDOUT.
Errors in parsig STDIN exit with a non-zero status code after writing the error to STDERR.
Your program must use recursion to search for solutions
use only Go standard library.
Example Output
$ echo "3 1 2" | go run . 3-1=2 $ echo "5 4 2 22" | go run . 5*4+2=22 $ (echo "3 1 2" && echo "9 2 18") | go run . 3-1=2 9*2=18 $ echo "6 2 3 4" | go run . 6*2/3=4 $ go run . < testdata/basic.txt 3 - 1 = 2 9 + 0 = 9 2 * 3 = 6 4 + 5 = 9 4 + 5 + 6 = 15 2 + 3 + 1 = 6
With multiple solutions it looks like:
$ echo "7 3 3 7" | go run . -all 7+3-3=7, 7-3+3=7, 7*3/3=7 $ go run . -all < testdata/basic.txt 3 - 1 = 2 9 + 0 = 9, 9 - 0 = 9 2 * 3 = 6 4 + 5 = 9 4 + 5 + 6 = 15 2 + 3 + 1 = 6, 2 * 3 * 1 = 6, 2 * 3 / 1 = 6
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