绗簲绔?/p>
if
璇彞缁冧範棰?/p>
1.
.
宸茬煡
int x=10,y=20,z=30;
浠ヤ笅璇彞鎵ц
鍚?/p>
x,y,z
鐨勫�兼槸
____ ____ _
if(x>y)
z=x;x=y;y=z;
2.
浠ヤ笅
if
璇彞璇硶姝ｇ‘鐨勬槸
________
A.if(x>0)
printf(
鈥?/p>
%f
鈥?/p>
,x)
else printf(
鈥?/p>
%f
鈥?/p>
,-x);
B.if(x>0)
{x=x+y;printf(
鈥?/p>
%f
鈥?/p>
,x);}
else printf(
鈥?/p>
%f
鈥?/p>
,-x);
C.if(x>0)
{x=x+y;printf(
鈥?/p>
%f
鈥?/p>
,x);}
else printf(
鈥?/p>
%f
鈥?/p>
,-x);
D.if(x>0)
{x=x+y;printf(
鈥?/p>
%f,x)
锛?/p>
}
else printf(
鈥?/p>
%f
鈥?/p>
,-x);
3.
璇烽槄璇讳互涓嬬▼搴?/p>
:
main( )
{int a=5,b=0,c=0;
if(a=b+c)printf(
鈥?/p>
* * *\n
鈥?/p>
);
else
printf(
鈥?/p>
$ $ $\n
鈥?/p>
);}
浠ヤ笂绋嬪簭
______
A.
鏈夎娉曢敊涓嶈兘閫氳繃缂栬瘧
B.
鍙互閫氳繃缂栬瘧浣嗕笉鑳介�氳繃杩炴帴
C.
杈撳嚭
* * * D.
杈撳嚭
$ $ $
4.
浠ヤ笅绋嬪簭鐨勮繍琛岀粨鏋滄槸
______
main( )
{int m=5;
if(m++>5)printf(
鈥?/p>
%d\n
鈥?/p>
,m);
else printf(
鈥?/p>
%d\n
鈥?/p>
,m--);}
A. 4 B. 5 C. 6 D. 7
5.
褰?/p>
a=1,b=3,c=5,d=4
鏃?/p>
,
鎵ц瀹屼笅闈竴娈电▼
搴忓悗
x
鐨勫�兼槸
______
if(a<b)
if(c<d) x=1;
else
if(a<c)
if(b<d)x=2;
else x=3;
else x=6;
else x=7;
A. 1 B. 2 C. 3 D. 6
6.
鏈変竴涓嚱鏁板叧绯昏涓嬭〃
:
x
y=
x<0
x-1
x=0
x
x>0
x+1
涓嬮潰绋嬪簭娈典腑鑳芥纭〃绀轰笂闈㈠叧绯荤殑鏄?/p>
( )
A. y=x+1;
if(x>=0)
if(x==0)y=x;
else y=x-1;
B. y=x-1;
if(x!=0)
if(x>0)y=x+1;
else y=x;
C. if(x<=0)
if(x<0)y=x-1;
else y=x;
else y=x+1;
D.y=x;
if(x<=0)
if(x<0)y=x-1;
else y=x+1;
7.
浠ヤ笅绋嬪簭鐨勮緭鍑虹粨鏋滄槸
______
main( )
{int a=100,x=10,y=20,okl=5,ok2=0;
if(x<y)
if(!ok1)
a=1;
else
if(ok2)
a=10;
a=-1;
printf(
鈥?/p>
%d\n
鈥?/p>
,a);}
A.1 B.0 C.-1 D.
鍊间笉纭畾
8.
浠ヤ笅绋嬪簭杈撳嚭缁撴灉鏄?/p>
_______
main( )
{int x=2,y=-1,z=2;
if(x<y)
if(y<0) z=0;
else z+=1;
printf(
鈥?/p>
%d\n
鈥?/p>
,z);
A.3 B.2 C.1 D.0
9.
浠ヤ笅涓嶆纭殑璇彞涓?/p>
______
A.if(x>y);
B.if(x=y)&&(x! =0) x+=y;
C,if(x! =y)scanf(
鈥?/p>
%d
鈥?/p>
,&x);
else scanf(
鈥?/p>
%d
鈥?/p>
,&y);
D.if(x<y){x++;y++;}
10.
闃呰浠ヤ笅绋嬪簭
#include<stdio.h>
main( )
{float a, b;
scanf(
鈥?/p>
%f
鈥?/p>
,&a);
if(a<0.0)b=0.0;
else if((a<0.5)&&(a!=2.0))b=1.0/(a+2.0);
else if(a<10.0)b=1.0/a;
else b=10.0;
printf(
鈥?/p>
%f\n
鈥?/p>
,b);}
鑻ヨ繍琛屾椂杈撳叆
2.0<
鍥炶溅
>,
鍒欎笂闈㈢▼搴忕殑杈撳嚭缁?/p>
鏋滄槸
_____