实验5

实验1

源码1:

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #define N 5
 4 
 5 void input(int x[],int n);
 6 void output(int x[],int n);
 7 void find_min_max(int x[],int n,int *pmin,int *pmax);
 8 
 9 int main(){
10     int a[N];
11     int min,max;
12 
13     printf("录入%d个数据:\n",N);
14     input(a,N);
15 
16     printf("数据是:\n");
17     output(a,N);
18 
19     printf("数据处理...\n");
20     find_min_max(a,N,&min,&max);
21 
22     printf("输出结果:\n");
23     printf("min=%d,max=%d\n",min,max);
24 
25     system("pause");
26     return 0;
27 }
28 
29 void input(int x[],int n){
30     int i;
31 
32     for(i=0;i<n;i++)
33         scanf("%d",&x[i]);
34 }
35 
36 void output(int x[],int n){
37     int i;
38 
39     for(i=0;i<n;i++)
40         printf("%d ",x[i]);
41     printf("\n");
42 }
43 
44 void find_min_max(int x[],int n,int *pmin,int *pmax){
45     int i;
46 
47     *pmin=*pmax=x[0];
48 
49     for(i=1;i<n;i++)
50         if(x[i]<*pmin)
51             *pmin=x[i];
52         else if(x[i]>*pmax)
53             *pmax=x[i];
54 }

截图1:

问题:

1.找到数组中的最大值和最小值

2.指向x[0]的地址

源码2:

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #define N 5
 4 
 5 void input(int x[],int n);
 6 void output(int x[],int n);
 7 int *find_max(int x[],int n);
 8 
 9 int main(){
10     int a[N];
11     int *pmax;
12 
13     printf("录入%d个数据:\n",N);
14     input(a,N);
15 
16     printf("数据是:\n");
17     output(a,N);
18 
19     printf("数据处理...\n");
20     pmax=find_max(a,N);
21 
22     printf("输出结果:\n");
23     printf("max=%d\n",*pmax);
24 
25     system("pause");
26     return 0;
27 }
28 
29 void input(int x[],int n){
30     int i;
31 
32     for(i=0;i<n;i++)
33         scanf("%d",&x[i]);
34 }
35 
36 void output(int x[],int n){
37     int i;
38 
39     for(i=0;i<n;i++)
40         printf("%d ",x[i]);
41     printf("\n");
42 }
43 
44 int *find_max(int x[],int n){
45     int max_index=0;
46     int i;
47 
48     for(i=1;i<n;i++)
49         if(x[i]>x[max_index])
50             max_index=i;
51 
52     return &x[max_index];
53 }

截图2:

问题:

1.返回数组中最大元素的地址

2.可以

实验2:

源码1:

 1 #include<stdio.h>
 2 #include<string.h>
 3 #include<stdlib.h>
 4 #define N 80
 5 
 6 int main(){
 7     char s1[N]="Learning makes me happy";
 8     char s2[N]="Learning makes me sleepy";
 9     char tmp[N];
10 
11     printf("sizeof(s1) vs. strlen(s1):\n");
12     printf("sizeof(s1)=%d\n",sizeof(s1));
13     printf("strlen(s1)=%d\n",strlen(s1));
14 
15     printf("\nbefore swap:\n");
16     printf("s1:%s\n",s1);
17     printf("s2:%s\n",s2);
18 
19     printf("\nswapping...\n");
20     strcpy(tmp,s1);
21     strcpy(s1,s2);
22     strcpy(s2,tmp);
23 
24     printf("\nafter swap:\n");
25     printf("s1:%s\n",s1);
26     printf("s2:%s\n",s2);
27 
28     system("pause");
29     return 0;
30 }

截图1:

源码2:

 1 #include<stdio.h>
 2 #include<string.h>
 3 #include<stdlib.h>
 4 #define N 80
 5 
 6 int main(){
 7     char *s1="Learning makes me happy";
 8     char *s2="Learning makes me sleepy";
 9     char *tmp;
10 
11     printf("sizeof(s1)vs. strlen(s1):\n");
12     printf("sizeof(s1)=%d\n",sizeof(s1));
13     printf("strlen(s1)=%d\n",strlen(s1));
14 
15     printf("\nbefore swap:\n");
16     printf("s1:%s\n",s1);
17     printf("s2:%s\n",s2);
18 
19     printf("\nswapping...\n");
20     tmp=s1;
21     s1=s2;
22     s2=tmp;
23 
24     printf("\nafter swap:\n");
25     printf("s1:%s\n",s1);
26     printf("s2:%s\n",s2);
27 
28     system("pause");
29     return 0;
30 }

截图2:

实验3:

源码:

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 
 4 int main(){
 5     int x[2][4]={{1,9,8,4},{2,0,4,9}};
 6     int i,j;
 7     int *ptr1;
 8     int (*ptr2)[4];
 9 
10     printf("\n输出1:使用数组名、下标直接访问二维数组元素\n");
11     for(i=0;i<2;i++){
12         for(j=0;j<4;j++)
13             printf("%d ",x[i][j]);
14         printf("\n");
15     }
16 
17     printf("\n输出2:使用指针变量ptr1(指向元素)间接访问\n");
18     for(ptr1=&x[0][0],i=0;ptr1<&x[0][0]+8;ptr1++,i++){
19         printf("%d ",*ptr1);
20 
21     if((i+1)%4==0)
22         printf("\n");
23     }
24 
25     printf("\n输出3:使用指针变量ptr2(指向一维数组)间接访问\n");
26     for(ptr2=x;ptr2<x+2;ptr2++){
27         for(j=0;j<4;j++)
28             printf("%d ",*(*ptr2+j));
29         printf("\n");
30     }
31 
32     system("pause");
33     return 0;
34 }

截图:

问题:

指向一个包含四个int类型元素的数组的指针变量          一个包含四个指向int类型数据的指针的指针数组

实验4:

源码:

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #define N 80
 4 
 5 void replace(char *str,char old_char,char new_char);
 6 
 7 int main(){
 8     char text[N]="Programming is difficult or not,it is a question.";
 9 
10     printf("原始文本:\n");
11     printf("%s\n",text);
12 
13     replace(text,'i','*');
14 
15     printf("处理后文本:\n");
16     printf("%s\n",text);
17 
18     system("pause");
19     return 0;
20 }
21 
22 void replace(char *str,char old_char,char new_char){
23     int i;
24 
25     while(*str){
26         if(*str==old_char)
27             *str=new_char;
28         str++;
29     }
30 }

截图:

问题:

将字符串中的某种字符换成某种指定的新字符          可以

实验5:

源码:

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #define N 80
 4 
 5 char *str_trunc(char *str,char x);
 6 
 7 int main(){
 8     char str[N];
 9     char ch;
10 
11     while(printf("输入字符串:"),gets(str)!=NULL){
12         printf("输入一个字符:");
13         ch=getchar();
14 
15         printf("截断处理...\n");
16         str_trunc(str,ch);
17 
18         printf("截断处理后的字符串:%s\n\n",str);
19         getchar();
20     }
21 
22     system("pause");
23     return 0;
24 }
25 
26 char *str_trunc(char *str,char x){
27     while(*str){
28         if(*str!=x)
29             str++;
30         else{
31             *str='\0';
32             break;
33         }
34     }
35 }

截图:

问题;

第一次操作后,无法输入指定字符     接受上一次操作的换行符

实验6:

源码:

 1 #include<stdio.h>
 2 #include<string.h>
 3 #include<stdlib.h>
 4 #define N 5
 5 
 6 int check_id(char *str);
 7 
 8 int main(){
 9     char *pid[N]={"31010120000721656X",
10                   "3301061996X0203301",
11                   "53010220051126571",
12                   "510104199211197977",
13                   "53010220051126133Y"};
14     int i;
15 
16     for(i=0;i<N;i++)
17         if(check_id(pid[i]))
18             printf("%s\tTrue\n",pid[i]);
19         else
20             printf("%s\tFalse\n",pid[i]);
21 
22     system("pause");
23     return 0;
24 }
25 
26 int check_id(char *str){
27     int count=0;
28     while(*str){
29         count++;
30         if(*str=='0'||*str=='1'||*str=='2'||*str=='3'||*str=='4'||*str=='5'||*str=='6'||*str=='7'||*str=='8'||*str=='9'){
31             str++;
32             if(count==17)
33                 break;
34             else
35                 continue;
36         }
37         else
38             return 0;
39     }
40     if(count!=17)
41         return 0;
42     else
43         if(*str=='0'||*str=='1'||*str=='2'||*str=='3'||*str=='4'||*str=='5'||*str=='6'||*str=='7'||*str=='8'||*str=='9'||*str=='X'&&*(str+1)=='\0')
44             return 1;
45         else
46             return 0;
47             
48 }

截图:

实验7:

源码:

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #define N 80
 4 void encoder(char *str,int n);
 5 void decoder(char *str,int n);
 6 
 7 int main(){
 8     char words[N];
 9     int n;
10 
11     printf("输入英文文本:");
12     gets(words);
13 
14     printf("输入n:");
15     scanf("%d",&n);
16 
17     printf("编码后的英文文本:");
18     encoder(words,n);
19     printf("%s\n",words);
20 
21     printf("对编码后的英文文本解码:");
22     decoder(words,n);
23     printf("%s",words);
24 
25     system("pause");
26     return 0;
27 }
28 
29 void encoder(char *str,int n){
30     while(n>=26)
31         n-=26;
32     while(*str){
33         if((*str>='a'&&*str<=('z'-n))||(*str>='A'&&*str<=('Z'-n)))
34             *str+=n;
35         else if((*str<='z'&&*str>('z'-n))||(*str<='Z'&&*str>('Z'-n)))
36             *str=*str+n-26;
37         str++;
38     }
39 }
40 
41 void decoder(char *str,int n){
42     while(n>=26)
43         n-=26;
44     while(*str){
45         if((*str>=('a'+n)&&*str<='z')||(*str>=('A'+n)&&*str<='Z'))
46             *str-=n;
47         else if((*str<('a'+n)&&*str>='a')||(*str<('A'+n)&&*str>='A'))
48             *str=*str+26-n;
49         str++;
50     }
51 }

截图:

实验8:

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #include<string.h>
 4 
 5 int main(int argc,char *argv[]){
 6     int i,j;
 7     char *t;
 8 
 9     for(j=1;j<argc;j++)
10         for(i=1;i<argc-j;i++)
11             if(strcmp(argv[i],argv[i+1])>0){
12                 t=argv[i];    
13                 argv[i]=argv[i+1];
14                 argv[i+1]=t;
15             }
16 
17     for(i=1;i<argc;i++)
18         printf("hello,%s\n",argv[i]);
19 
20     system("pause");
21     return 0;
22 }

截图:

 

posted @ 2024-12-10 18:01  liuseki  阅读(4)  评论(0编辑  收藏  举报