7道C语言面试题，7分钟完成。你能做对几道？

2017-09-20 04:54:29 474 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

7道C语言面试题，7分钟完成。你能做对几道？请在下列所有题目的横线上填写printf的值 1 void e(int n) { if(n>0) { e(--n); printf("%d",n); e(--n); } } int main() { int a; a=3; e(a); } 2 int i=3; int j; j = s 阅读详情

请在下列所有题目的横线上填写printf的值

//1

void e(int n) { 

    if(n>0) { 

        e(--n); 

        printf("%d",n); 

        e(--n); } 

}

int main() {

    int a; 

    a=3; 

    e(a); 

}

// 2

  int i=3; 

  int j; 

 j = sizeof(++i+ ++i); 

 printf("%d%d", i ,j);



//3

   int a[5]={1,2,3,4,5};  

   int *ptr=(int *)(&a+1);   

   printf("%d%d",*(a+1),*(ptr-1));

//4

struct node { char a; char b; char c;char d;};

int main() {

    struct node s= { 3, 1,0,8 };

    struct node *pt = &s;

printf("%d" , *(unsigned short*)pt);}





//5	

#define value(Structure,Field)  \

((unsigned int)&(((Structure*)0)->Field))

typedef struct {

    short a;

char b;

char* c;

long  (*d)[3];

    float e;

}init;

int main()

{

    printf("%d",value(init,e));

}



//6

 float a=27.02;

 int i=8,j=32;

unsigned int b = *(unsigned int*)&a;

int c= b-0x8ED212CC;

printf("%d%d",j-2*i,i+=((c<0)?-1:2));



				

//7

int (*foo(int(*a)[3]))[3]{return ++a;}

int main(){

 int a[3][3]={2,-1,3,4,8,1,20,7,6} ;

 int ( *p )[3] = foo( a );

 printf("%d",*1[p]);}