C语言试题
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一、Select one answer from the four answers：（
for each question, a total of 30 points）
1.Which of the following expressiong is the equivalent to k=n++? ( ).
A) k=n,n=n+1 B)n=n+1,k=n C)k=++n D)k+=n+1
2.What will be the printed output of the following program? ( ).
main( )
{ int x=10,y=10;
printf("%d %d\n",x--,--y);
}
A)10 10 B) 9 9 C) 9 10 D) 10 9
3.Choose the correct output that following program produces. ( ).
main()
{ int x;
x=-3+4*5-6; printf("%d",x);
x= 3+4%5-6; printf("%d",x);
x=-3*4%6/5; printf("%d",x);
x=(7+6)%5/2; printf("%d",x);
}
A) 11 1 0 1 B) 11 -3 2 1 C) 12 -3 2 1 D)11 1 2 1
4. The printed output of the following program is ( ).
#include
main()
{ int y=10;
do{y--;}while(--y);
printf("%d\n",y--);
}
A) -1 B) 1 C) 8 D) 0
5. The printed output of the following program is ( ).
#include
main()
{ int i,b,k=0;
for(i=1;i<=5;i++)
{ b=i%2;
while(b-->=0) k++;
}
printf("%d, %d",k,b);
}
A) 3, -1 B) 8, -1 C) 3, 0 D) 8, -2
6.The correct expression to determain whether ch is a capital letter is( ).
A) 'A'<=ch<='Z' B) (ch>='A')&&(ch<='Z')
C) (ch>='A')&(ch<='Z') D) (ch>='A')AND(ch<='Z')
7.Given a program as follows,the output will be( ) if data ADescriptor
is keyed in when the program is running.
#include
main()
{ char c;
int v0=0,v1=0,v2=0;
do{
switch( c=getchar())
{ case 'a': case 'A':
case 'e': case 'E':
case 'i': case 'I':
case 'o': case 'O':
case 'u': case 'U': v1+=1;
default: v0+=1; v2+=1;
}
}while(c!='\n');
printf("v0=%d,v1=%d,v2=%d",v0,v1,v2);
}
A)v0=7,v1=4,v2=7; B)v0=8,v1=4,v2=8;
C)v0=11,v1=4,v2=11; D)v0=12,v1=4,v2=12;
8.Given the declarations
int a[][3]={1,2,3,4,5,6,7,8,9}
the size of the first dimension of array a is ().
A) 2 B) 3 C) 4 D) 5
9.The return type of the following program is( ).
seed(double y)
{
double z;
z=x/2+5;
return y;
}
A)int B)uncertain C)void D)float
10. The following program will print out( ).
main()
{
int m=5;
if(m++>5) printf("%d\n",m);
else printf("%d\n",m--);
}
A) 4 B) 5 C) 6 D) 7
11. Perform the following program. The printed output will be ( )if 3 is keyed in.
#include
main()
{
int k;
scanf("%d",&k);
switch(k)
{
case 1:printf("%d\n",k++);
case 2:printf("%d\n",k++);
case 3:printf("%d\n",k++);