第一篇：大連東軟信息學院C語言指針練習2016.docx

一、Make a choice 1.For the same data type pointer variable, which operator can notused in C program.A.+

B.-

C.=

D.== 2.when0<=i<10, for the following statements, which reference is wrong to reference array elements.int a[]={1,2,3,4,5,6,7,8,9,0}, *p, i;p=a;A.*(a+i)

B.a[p-a]

C.p+i

D.*(&a[i])3.when0<=i<10, for the following statements, which reference is wrong to reference the address of array elements.int a[]={1,2,3,4,5,6,7,8,9,0}, *p,i;

p=a;

A.&(a+1)

B.a++

C.&p

D.&p[i] 4.What is the result for the following program? #include main(){ int a[]={1,2,3,4,5,6},*p;

p=a;

*(p+3)+=2;printf(“%d,%dn”,*p,*(p+3));}

A.0,5

B.1,5

C.0,6

D.1,6 5.what is the result for the following program? #include main(){ int a[12]={1,2,3,4,5,6,7,8,9,10,11,12}, *p[4],i;for(i=0;i<4;i++)p[i]=&a[i*3];printf(“%dn”,p[3][2]);}

A.輸出項不合法

B.6

C.8

D.12 6.For the following statements, what’s the value of(p1-p2)? int a[10], *p1, *p2;p1=a;p2=&a[5];

A.5

B.6

C.10

D.沒有指針與指針的減法

7.for this function prototype: void adder(int *ptr,int b);if there are two integers: int op1=2;int op2=4;which statement of function call is right?

A:adder(*op1,op2);B:adder(op1,op2);C:adder(&op1,op2);D:adder(&op1,&op2);8.What does the following program outputs to screen_____ voidToSrn(int *);main(){ int a=8;int *ptr=&a;ToSrn(ptr);} voidToSrn(int *ptr){ printf(“%p”,&a);} A:compile error,can not be run B:8 C:16 D:address of a 9.Assuming int *p,a=4;p=&a;which of the following statements is all means address A:a,p+1 B:&a,*p C:&a,p D:*a,p 10.Assuming inta[10],*p;which one is right A:*p=&a[0];B:*p=a;C:p=a[0];D:p=&a[0];11.Assuming ：int a[10]，*p=a；which one is the address of a[9] A:a[0]+9 B:&(p+9)C:*(p+9)D:a+9 12.Assuming:

char s1[]=“Hello”,s2[10],*s3=“HelloWorld”,*s4;which one of the following statements is correct？ A:strcpy(s1[0],“Morning”);B:s2=“Morning”;C:strcpy(s3,“Morning”);D:strcpy(s4,“Morning”);13.For the following statements，after execution the statement a=p+2;what’s the value of a[0]? float a[3]={1.2,45.6,-23.0};float *p=a;

A.1.2

B.45.6

C.-23.0

D.語句有錯

14.What format speci?ers(in order)should be used in the printf()statement in thefollowing program? Note that in the program the correct format speci?ers have beenreplaced by Z.#include int main(void){ int x = 5;int *x_ptr = &x;printf(“%Z, %Z, %Z, %Zn”, x, *x_ptr, &x, x_ptr);}(a)%f, %p, %d, %p(b)%d, %d, %p, %p(c)%d, %p, %d, %p(d)%p, %d, %d, %p

二、Fill the blank.1.the result of printf(“%sd”,“ab