# c实验5

实验任务1
#include<stdio.h>
#define N 4
int main()
{
int x[N]={1,9,8,4};
int i;
int *p;
for(i=0;i<N;++i)
printf("%d",x[i]);
printf("\n");
for(p=x;p<x+N;++p)
printf("%d",*p);
printf("\n");
p=x;
for(i=0;i<N;++i)
printf("%d",*(p+i));
printf("\n");
p=x;
for(i=0;i<N;++i)
printf("%d",p[i]);
printf("\n");
return 0;
}

#include<stdio.h>
int main()
{
int x[2][4]={{1,9,8,4},{2,0,4,9}};
int i,j;
int *p;
int(*q)[4];
for(i=0;i<2;++i)
{
for(j=0;j<4;++j)
printf("%d",x[i][j]);
printf("\n");
}
for(p=&x[0][0],i=0;p<&x[0][0]+8;++p,++i)
{
printf("%d",*p);
if((i+1)%4==0)
printf("\n");
}
for(q=x;q<x+2;++q)
{
for(j=0;j<4;++j)
printf("%d",*(*q+j));
printf("\n");
}
return 0;
}

实验任务2
#include<stdio.h>
#include<string.h>
#define N 80
int main()
{
char s1[]="Learning makes me happy";
char s2[]="Learning makes me sleepy";
char tmp[N];

printf("sizeof(s1) vs.strlen(s1):\n");
printf("sizeof(s1)=%d\n",sizeof(s1));
printf("strlen(s1)=%d\n",strlen(s1));

printf("\nbefore swap:\n");
printf("s1:%s\n",s1);
printf("s2:%s\n",s2);

printf("\nswapping…\n");
strcpy(tmp,s1);
strcpy(s1,s2);
strcpy(s2,tmp);

printf("\nafter swap:\n");
printf("s1:%s\n",s1);
printf("s2:%s\n",s2);
return 0;
}

#include<stdio.h>
#include<string.h>
#define N 80

int main()
{
char *s1="Learning makes me happy";
char *s2="Learning makes me sleepy";
char *tmp;

printf("sizeof(s1) vs.strlen(s1):\n");
printf("sizeof(s1)=%d\n",sizeof(s1));
printf("strlen(s1)=%d\n",strlen(s1));

printf("\nbefore swap:\n");
printf("s1:%s\n",s1);
printf("s2:%s\n",s2);

printf("\nswapping…\n");
tmp=s1;
s1=s2;
s2=tmp;

printf("\nafter swap:\n");
printf("s1:%s\n",s1);
printf("s2:%s\n",s2);

return 0;
}

实验任务3
#include<stdio.h>
void str_cpy(char *target,const char *source);
void str_cat(char *str1,char *str2);
int main()
{
char s1[80],s2[20]="1984";
str_cpy(s1,s2);
puts(s1);
str_cat(s1," Animal Farm");
puts(s1);
return 0;
}
void str_cpy(char *target,const char *source)
{
while(*target++=*source++)
;
}
void str_cat(char *str1,char *str2)
{
while(*str1)
str1++;
while(*str1++=*str2++)
;
}

实验任务4
#include<stdio.h>
#define N 80
int func(char *);
int main()
{
char str[80];
while(gets(str)!=NULL)
{
if(func(str))
printf("yes\n");
else
printf("no\n");
}
return 0;
}
int func(char *str)
{
char *begin,*end;
begin=end=str;
while(*end)
end++;
end--;
while(begin<end)
{
if(*begin!=*end)
return 0;
else
{
begin++;
end--;
}
}
return 1;
}

实验任务5
#include<stdio.h>
#define N 80
void func(char *);
int main()
{
char s[N];
while(scanf("%s",s)!=EOF)
{
func(s);
puts(s);
}
return 0;
}
void func(char *str)
{
int i;
char *p1,*p2,*p;
p1=str;
while(*p1=='*')
p1++;
p2=str;
while(*p2)
p2++;
p2--;
while(*p2=='*')
p2--;
p=str;
i=0;
while(p<p1)
{
str[i]=*p;
p++;
i++;
}
while(p<=p2)
{
if(*p!='*')
{
str[i]=*p;
i++;
}
p++;
}
while(*p!='\0')
{
str[i]=*p;
p++;
i++;
}
str[i]='\0';
}

实验任务6
#include<stdio.h>
#include<string.h>
void sort(char *name[],int n);
int main()
{
char *course[4]={"C Program",
"C++ Object Oriented Program",
"Operating System",
"Data Structure and Algorithms"};
int i;
sort(course,4);
for(i=0;i<4;i++)
printf("%s\n",course[i]);
return 0;
}
void sort(char *name[],int n)
{
int i,j;
char *tmp;
for(i=0;i<n-1;++i)
for(j=0;j<n-1-i;++j)
if(strcmp(name[j],name[j+1])>0)
{
tmp=name[j];
name[j]=name[j+1];
name[j+1]=tmp;
}
}

#include<stdio.h>
#include<string.h>
void sort(char *name[],int n);
int main()
{
char *course[4]={"C Program",
"C++ Object Oriented Program",
"Operating System",
"Data Structure and Algorithms"};
int i;
sort(course,4);
for(i=0;i<4;i++)
printf("%s\n",course[i]);
return 0;
}
void sort(char *name[],int n)
{
int i,j,k;
char *tmp;
for(i=0;i<n-1;i++)
{
k=i;
for(j=i+1;j<n;j++)
if(strcmp(name[j],name[k])<0)
k=j;
if(k!=i)
{
tmp=name[i];
name[i]=name[k];
name[k]=tmp;
}
}
}

实验任务7
#include<stdio.h>
#include<string.h>
#define N 5
int check_id(char *str);
int main()
{
char *pid[N]={"31010120000721656X",
"330106199609203301",
"53010220051126571",
"510104199211197977",
"53010220051126133Y"};
int i;
for(i=0;i<N;++i)
if(check_id(pid[i]))
printf("%s\tTrue\n",pid[i]);
else
printf("%s\tFalse\n",pid[i]);
return 0;
}
int check_id(char *str)
{
if(strlen(str)!=18)
return 0;
else
{
char *p;
p=str;
while(*p>='0'&&*p<='9'&&*p!='\0'||*p=='X')
p++;
if(*p=='\0')
return 1;
else
return 0;
}
}

实验任务8
#include<stdio.h>
#define N 80
void encoder(char *s);
void decoder(char *s);
int main()
{
char words[N];
printf("输入英文文本：");
gets(words);
printf("编码后的英文文本：");
encoder(words);
printf("%s\n",words);
printf("对编码后的英文文本解码：");
decoder(words);
printf("%s\n",words);
return 0;
}
void encoder(char *s)
{
char *p;
p=s;
while(*p)
{
if(*p>='a'&&*p<='y'||*p>='A'&&*p<='Z')
(*p)++;
else if(*p=='z'||*p=='Z')
*p=*p-25;
p++;
}
}
void decoder(char *s)
{
char *p;
p=s;
while(*p)
{
if(*p>='b'&&*p<='z'||*p>='B'&&*p<='Z')
(*p)--;
else if(*p=='A'||*p=='a')
*p=*p+25;
p++;
}
}

posted @ 2023-05-06 07:44  202183360008仲苏洋  阅读(16)  评论(0编辑  收藏  举报