numpy求二维矩阵H每行的和:
A: sum(axis=1)
B: sum(axis=0)
C: sum(axis=-1)
D: sum()
A: sum(axis=1)
B: sum(axis=0)
C: sum(axis=-1)
D: sum()
举一反三
- #求1-100中所有整数的和 sum=0 foriinrange(1,____): sum=sum+_____ print("sum=",sum)
- 在下列程序段中,不能计算1到100之间奇数之和的是__________。 A: Dim sum As Integer sum = 0 For i = 1 To 100 Step 2 sum = sum + i Next B: Dim sum As Integer sum = 0 For i = 1 To 100 If i Mod 2 <> 0 Then sum = sum + i Next C: Dim sum As Integer sum = 0 For i = 1 To 99 sum = sum + i Next D: Dim sum As Integer sum = 0 For i = 100 To 1 Step -1 If i Mod 2 <> 0 Then sum = sum + i Next
- 输入一个正整数给变量n,求1到n的所有正整数之和。不正确的程序是()。 A: #includevoidmain(){inti,n,sum;scanf("%d",&n);for(i=1,sum=0;i<=n;i++)sum=sum+i;printf("%d",sum);} B: #includevoidmain(){inti,n,sum=0;scanf("%d",&n);for(i=1;i<=n;i++)sum=sum+i;printf("%d",sum);} C: #includevoidmain(){inti,n,sum;scanf("%d",&n);for(i=1;i<=n;i++)sum=sum+i;printf("%d",sum);} D: #includevoidmain(){inti,n,sum;scanf("%d",&n);for(i=1,sum=0;i<=n;)sum=sum+i,i++;printf("%d",sum);}
- 以下程序段的执行结果是______。 int s=0,i=1; do { S+=i++; } while(i<=10); Console.WriteLine("sum={0}",sum); A: sum=54 B: sum=1 C: sum=55 D: sum=30
- 下列for语句表示正确的是( ) A: for(Sum=0; i=<10; i++) B: for(Sum=0; i=1,i++) C: for(Sum=0, i=1, i++) D: for(Sum=0, i=1; i++)