Go语言实现数字串运算符修改及计算

package main

import ( "fmt" "strconv" "strings" )

func main() { var n, m int fmt.Scan(&n)

nums := make([]int, n)
for i := 0; i < n; i++ {
    fmt.Scan(&nums[i])
}

fmt.Scan(&m)

operations := make([]string, m)
for i := 0; i < m; i++ {
    fmt.Scan(&operations[i])
}

for i := 0; i < m; i++ {
    index, _ := strconv.Atoi(operations[i*2])
    operator := operations[i*2+1]

    nums[index-1] = calculate(nums[index-1], nums[index], operator)
}

result := nums[0]
for i := 1; i < n; i++ {
    result = calculate(result, nums[i], '+')
}

fmt.Println(result)

}

func calculate(a, b int, operator string) int { switch operator { case '+': return a + b case '-': return a - b case '*': return a * b case '/': return a / b default: return 0 } }