实验4

实验1.1

代码

 1  #include <stdio.h>
 2  #define N 4
 3  
 4  void test1(){
 5      int a [N] = {1,9,8,4};
 6      int i;
 7      
 8      printf("sizeof(a) = %d\n",sizeof(a));
 9      
10      for (i = 0; i<N;++i)
11          printf("%p: %d\n",&a[i],a[i]);
12          
13     printf("a=%p\n",a); 
14  }
15  void test2(){
16      char b[N]={'1','9','8','4'};
17      int i;
18      printf("sizeof(b)=%d\n",sizeof(b));
19      for (i=0;i<N;++i)
20          printf("%p:%c\n",&b[i],b[i]);
21          printf("b=%p\n",b);
22          
23  }
24  
25  int main(){
26      printf("测试1:int类型一维数组\n");
27      test1();
28      
29      printf("\n测试2：char类型一维数组\n");
30      test2();
31      
32      return 0;
33  }

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 问题

1：不连续，16，不一样

2.连续，4，不一样

实验1.2

代码

 1  #include <stdio.h>
 2  #define N 2
 3  #define M 4
 4  
 5  void test1(){
 6      int a[N][M] = {{1,9,8,4},{2,0,4,9}};
 7      int i,j;
 8      
 9      printf("sizeof(a) = %d\n",sizeof(a));
10      
11      for (i = 0; i<N;++i)
12          for(j=0;i<N;++i)
13              printf("%p: %d\n",&a[i][j],a[i][j]);
14          
15     printf("\n"); 
16     printf("a=%p\n",a);
17     printf("a[0]=%p\n",a[0]);
18     printf("a[1]=%p\n",a[1]);
19     printf("\n");
20  }
21  void test2(){
22  char b [N][M] ={{'1','9','8','4'},{'2','0','4','9'}};
23      int i ,j;
24      printf("sizeof(b)=%d\n",sizeof(b));
25      for (i=0;i<N;++i)
26      for(j=0;j<M;++j)
27          printf("%p:%c\n",&b[i][j],b[i][j]);
28          printf("\n");
29          printf("b=%p\n",b);
30          printf("b[0]=%p\n",b[0]);
31         printf("b[1]=%p\n",b[1]);
32          
33          
34  }
35  
36  int main(){
37      printf("测试1:int类型一维数组\n");
38      test1();
39      
40      printf("\n测试2：char类型一维数组\n");
41      test2();
42      
43      return 0;
44  }

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 问题

1.

实验2

代码

 1 #include<stdio.h>
 2 #include<string.h>
 3 
 4 #define N 80
 5 
 6 void swap_str(char s1[N],char s2[N]);
 7 void test1();
 8 void test2();
 9 
10 int main(){
11     printf("测试1；用两个一维char数组，实现两个字符交换\n");
12     test1();
13     
14     printf("\n测试2；用二维char数组，实现两个字符串交换\n");
15     test2();
16     return 0;
17 }
18 
19 void test1(){
20     char views1[N]="hey,C,I hate u.";
21     char views2[N]="hey,C,I love u.";
22     
23     printf("交换前；\n");
24     puts(views1);
25     puts(views2);
26     
27     swap_str(views1,views2);
28     
29     printf("交换后； \n");
30     puts(views1);
31     puts(views2);
32     
33     swap_str(views1,views2);
34     
35     printf("交换后； \n");
36     puts(views1);
37     puts(views2);
38     
39     swap_str(views1,views2);
40     
41     printf("交换后； \n");
42     puts(views1);
43     puts(views2);
44     
45 }
46 void test2(){
47     char views[2][N]={"hey,c,I hate u.",
48                         "hey,c,I love u."};
49     printf("交换前； \n");
50     puts(views[0]);
51     puts(views[1]);
52         swap_str(views[0],views[1]);
53     printf("交换后； \n");
54         puts(views[0]);
55     puts(views[1]);
56     
57     
58 }
59 void swap_str(char s1[N],char s2[N]){
60     char tmp[N];
61     strcpy(tmp,s1);
62     strcpy(s1,s2);
63     strcpy(s2,tmp);
64     }

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