cycle_replase_str.go

package main

import (
	"fmt"
	"strings"
)

const num_count int = 146
const fill_char string = "5"

const first_check string = "333"
const first_change string = "5"
const second_check string = "555"
const second_change string = "3"

func main() {
	this_string := strings.Repeat(fill_char, num_count)
	for strings.Index(this_string, first_check) > -1 || strings.Index(this_string, second_check) > -1 {
		if strings.Index(this_string, first_check) > -1 {
			this_string = strings.Replace(this_string, first_check, first_change, 1)
		} else {
			this_string = strings.Replace(this_string, second_check, second_change, 1)
		}
	}
	fmt.Print(this_string)
}