Question

（循环语句）程序用于求1+3+3^2+3^3+……+3^10的值

求解析，支持手写体，谢谢在线等

Answer 1

Private Sub Command1_Click()
Dim s As Long, t As Long, i As Integer
s = 1
For i = 1 To 10
t = 3 ^ i
s = s + t
Next i
Label1.Text = "s=" & s
End Sub
变量应该定义为long类型，integer会溢出

Answer 2

int main()
{
int i,sum=0;
for(i=0;i<=10;i++)
{
sum+=pow(3,i);
}
printf("%d",sum);
}
记得方法头加上include<math.h>