A) 0 B) 1 C) 2 D) 3 19. ÒÔϳÌÐòµÄÊä³ö½á¹ûÊÇ£º£¨ D £© main()
{ int x=10£¬y=10£¬i£» for(i=0£»x>8£»y=i ) printf(¡°%d %d ¡±£¬x--£¬y)£» }
A)10 1 9 2 B)9 8 7 6 C)10 9 9 0 D)10 10 9 0 20. ÒÔϳÌÐòµÄÊä³ö½á¹ûÊÇ£º£¨ A £© main()
{ int i£»
for(i=1£»i<=6£»i++) { if(i%2)
{ printf(¡°#¡±)£»
continue£» }
printf(¡°*¡±)£» }
printf(¡°\\n¡±)£» }
A)#*#*# B)##### C)***** D)*#*#* 21. ÒÔϳÌÐòµÄÊä³ö½á¹ûÊÇ£º£¨ D £© main()
{ int i£»
for(i='A'£»i<='I'£»i++)
printf(¡°%c¡±£¬i+32)£»
printf(¡°\\n¡±)£» }
A)±àÒ벻ͨ¹ý£¬ÎÞÊä³ö B) aceg C)acegi D)abcdefghi 22. ÒÔϳÌÐòÊä³ö½á¹ûÊÇ£º£¨ C £© main () { int m=5; if (m>5)
printf (¡°%d\\n¡±£¬m)£»
else
printf (¡°%d\\n¡±£¬m--)£»
}
A £©7 B £©6 C£©5 D£©4
23. ÔËÐÐÒÔϳÌÐòºó£¬Èç¹û´Ó¼üÅÌÉÏÊäÈëchina#¡¶»Ø³µ¡·£¬ÔòÊä³ö½á¹ûΪ£º£¨ #include
{ int v1=0,v2=0; char ch ; while ((ch=getchar())£¡='#') switch (ch ) { case 'a'£º case 'h'£º
C £© default£ºv1++£» case '0'£ºv2++£» }
printf(¡°%d,%d\\n¡±£¬v1,v2)£»
}
A£© 2,0 B£©5,0 C£© 5,5 D£©2,5 24. ÉèÓÐÈç϶¨Ò壺
int a=1,b=2,c=3,d=4,m=2,n=2;
ÔòÖ´Ðбí´ïʽ£º(m=a>b)&&(n=c>d)ºó£¬nµÄֵΪ£º£¨ D £©
A)1 B)2 C)3 D)0 25. ÒÔϳÌÐòµÄÊä³ö½á¹ûÊÇ£º£¨ B £© main()
{ int i,j,x=0;
for (i=0;i<2;i++) { x++£»
for(j=0;j<3;j++) { if (j%2)
continue;
x++£»
}
x++£»
}
printf(¡°x=%d\\n¡±£¬x)£»
}
A)x=4 B)x=8 C)x=6 D)x=12
26. ÉèxºÍy¾ùΪintÐͱäÁ¿£¬ÔòÖ´ÐÐÒÔϵÄÑ»·ºó£¬yֵΪ£º£¨ C £© for(y=1,x=1;y<=50;y++) { if(x==10))
break;
if (x%2==1) { x+=5;
continue; }
x-=3; }
A)2 B)4 C)6 D)8
27. ¼Ù¶¨aºÍbΪintÐͱäÁ¿£¬ÔòÖ´ÐÐÒÔÏÂÓï¾äºóbµÄֵΪ£º£¨ D £© a=1;b=10; do
{ b-=a; a++£»
}while (b--<0)£»
A)9 B)-2 C)-1 D)8
28. ÉèjΪintÐͱäÁ¿£¬ÔòÏÂÃæforÑ»·Óï¾äµÄÖ´Ðнá¹ûÊÇ£º£¨ B £© for (j=10;j>3;j--) { if(j%3) j--£» --j;--j;
printf(¡°%d ¡±£¬j)£» }
A)6 3 B)7 4 C)6 2 D)7 3 29. ÓÐÒÔϳÌÐò main() { int x, i;
for(i=1;i<=50;i++) { x=i; if(x%2==0)
{ x++;
if(x%3==0) { x++;
if(x%7==0) { x++;
printf(\} } }
} }
Êä³ö½á¹ûÊÇ£º£¨ D £©
A)28 B)27 C)42 D)26
30. ¼Ù¶¨ËùÓбäÁ¿¾ùÒÑÕýȷ˵Ã÷£¬ÏÂÁгÌÐò¶ÎÔËÐкóxµÄÖµÊÇ£º£¨ B £© a=b=c=0;x=35; if(!a)
x--;
else if(b) ;
if(c)
x=3;
else
x=4;
A)34 B)4 C)35 D)3
31. Ö´Ðбí´ïʽk = ( 10>12 ? 15 £º6>5 ? 8 £º9 )ºó£¬±äÁ¿kµÄֵΪ£º£¨A. 9 B. 8 C. 15 D. 1 32. ÒÔϳÌÐòÔËÐкó£¬Èç¹û´Ó¼üÅÌÉÏÊäÈË5£¬ÔòÊä³ö½á¹ûÊÇ£º£¨ B £©
main( ) {
int x£»
scanf(\£¬&x)£» if(x--<5)
printf(\£¬x)£» else
printf(\£¬x++)£» } A¡¢3 B¡¢4 C¡¢5 D¡¢6 33. ÒÔϳÌÐò¶ÎµÄÊä³ö½á¹ûÊÇ£º£¨ D £©
B £©
int k, j , s ;
for(k=2;k<6;k++,k++) { s=1;
for (j=k;j<6;j++) s+=j; }
printf(¡°%d\\n¡±,s);
A£©9 B£©1 C£©11 D£©10 34. ÒÔϳÌÐò¶ÎµÄÊä³öÊÇ£º£¨ C £© int i,j,m=0;
for (i=1;i<=15;i+=4)
for (j=3;j<=19;j+=4) m++;
printf(¡°%d\\n¡±,m);
A£©12 B£©15 C£©20 D£©25 35. ÒÔϳÌÐò¶ÎµÄÊä³ö½á¹ûÊÇ£º£¨ C £© int i, sum;
for(i=1;i<6;i++)
sum+=sum;
printf(¡°%d\\n¡±,sum);
A£©15 B£©14 C£©²»È·¶¨ D£©0 36. ÏÂÃæ³ÌÐòµÄÊä³öÊÇ£º£¨ D £© main()
{ int x=3,y=6,a=0; while (x++!=(y-=1)) { a++;
if (y printf(\ } A) x=4,y=4,a=1 B) x=5,y=5,a=1 C) x=5,y=4,a=3 D) x=5,y=4,a=1 37. ¶¨ÒåÈçϱäÁ¿£ºint n=10£»ÔòÏÂÁÐÑ»·µÄÊä³ö½á¹ûÊÇ£º£¨ B £© while (n>7) { n--; printf(\ } A) 10 9 8 B) 9 8 7 C) 10 9 8 7 D) 9 8 7 6 38. ÒÔϳÌÐò¶ÎµÄÊä³ö½á¹ûÊÇ£º£¨ C £© int x=3; do { printf(\} while (!(--x)); A) 1 B) 3 0 C) 1 -2 D) ËÀÑ»· 39. Ö´ÐÐÏÂÃæµÄ³ÌÐòºó£¬aµÄֵΪ£º£¨ B £© main()