A: D[i]=D[i−1]+X[i]，当D[i−1]>0 D[i]=X[i]，当当D[i−1]≤0
B: D[i]=D[i]+X[i]，当D[i−1]>0 D[i]=X[i]，当当D[i−1]≤0
C: D[i]=D[i+1]+X[i]，当D[i−1]>0 D[i]=X[i]，当当D[i−1]≤0
D: D[i]=D[i-1]+X[i]，当D[i−1]>0 D[i]=D[i-1]+X[i]，当当D[i−1]≤0
举一反三
- 关于最大子数组和问题，对于子数字X[1..n]，D[i]表示以X[i]开始的最大子数组和，则D[i]的递推式，下述正确的是（ ）。[/i][/i][/i] A: D[i]=D[i−1]+X[i]，当D[i−1]>0 D[i]=X[i]，当D[i−1]≤0 B: D[i]=D[i+1]+X[i]，当D[i+1]>0 D[i]=X[i]，当当D[i+1]≤0 C: D[i]=D[i−1]+X[i]，当D[i−1]≤0 D[i]=X[i]，当D[i−1]>0 D: D[i]=D[i+1]+X[i]，当D[i+1]≤0 D[i]=X[i]，当当D[i+1]>0
- #includevoidmain(){intb[51],x,i,j=0,n=0;scanf("%d",&x);while(x>-1){b[++n]=x;scanf("%d",&x);}for(i=1;i<=n;i++)if(b[i]%2==0)b[++j]=b[i];for(i=1;i<=j;i++)printf("%d",b[i]);}若输入78962-1输出什么？（5.0分）
- 若定义：int i=101,x; 求执行语句while( x=i-- ); 后x与i 的值 ( )。 A: x=0,i=-1 B: x=101,i=100 C: x=0,i=0 D: x=-1,i=-1
- 下述for语句 int i,x; for (i=0,x=1;i<=9&&x!=876;i++) scanf(%d”,&x);
- 下列哪些是离散型随机变量分布律 A: P(X=i)=1/i (i=1,2,3) B: P(X=1)=-1,P(X=0)=1 C: P(X=-1)=1/2,P(X=1)=1/2 D: P(X=i)=i/6 (i=1,2,3)
内容
- 0
有以下程序 ,其输出结果是 main() { int x,i; for(i=1;i < =50;i++) { x=i; if(x%2==0) if(x%3==0) if(x%7==0) printf("%d",i); } }
- 1
下列程序段可以正确运行的有： A: int i,s,x;s=0;i=0;while（1）{ scanf("%d",&x); if(x!=-1) { s=s+x; i++; } else break;}printf("ave=%d\n",s/i); B: int i,s,x;s=0;i=0;scanf("%d",&x);while（x!=-1）{ s=s+x; i++; scanf("%d",&x);}printf("ave=%d\n",s/i); C: int i,s,x;s=0;i=0;while（1）{ scanf("%d",&x); if(x==-1) break; s=s+x; i++; }printf("ave=%d\n",s/i);
- 2
使用数组x输出10个1-100之间的随机整数(包括1和100),下列命令中正确的是:( ) A: Dim x(9) As Integer For i = 1 To UBound(x) x(i) = Int(Rnd() * 100 + 1) Print x(i); Next B: Dim x(9) As Integer For i = 0 To UBound(x) x(i) = Rnd(10) Print x(i); Next C: Dim x(9) As Integer For i = 0 To UBound(x) x(i) = Int(Rnd() * 100 ) Print x(i); Next D: Dim x(9) As Integer For i = 0 To UBound(x) x(i) = Int(Rnd() * 100 + 1) Print x(i); Next
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声明一个变量为局部变量应该用（ ）。 A: Private Sub Command1 Click() n=5：x=1 Do X=X * I I=I + 1 Loop While I ＜ n Print x End Sub B: Private Sub Command1_Click() n=5：X=1：I=1 Do X=X*I I=I + 1 Loop While I ＜n Print x End Sub C: Private Sub Command1_Click() n=5：X=1：I=1 Do X=X * I I=I + 1 Loop While I＜=n Print X End Sub D: Private Sub Command1_Click() n=5：X=1：I=1 Do X=X * I I=I + 1 Loop While I＞n Print X End Sub
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以下程序若运行时输入:246 ,结果是。 main() {int x[3][2]={0},i; for(i=0;i<3;i++) scanf("%d",&x[i]); printf("%3d%3d%3d ",x[0][0],x[0][1],x[1][0]); }