实验3 C语言函数应用编程

1、实验1

实验1 运行结果

实现了每隔一秒随机弹出“hi，November~”。

2、实验2

实验2-1 源代码

 1 #include<stdio.h>
 2 long long fac(int n);
 3 
 4 int main()
 5 {
 6     int i,n;
 7     
 8     printf("Enter n:");
 9     scanf("%d",&n);
10     
11     for(i = 1;i <= n;++i){
12         printf("&d! = %lld\n",i,fac(i));
13     }
14     return 0;
15 }
16 long long fac(int n)
17 {
18     static long long p = 1;
19    20     p = p * n;
21     
22     return p;
23 }

实验2-1 运行结果

实验2-2 源代码

 1 #include<stdio.h>
 2 int func(int,int);
 3 
 4 int main()
 5 {
 6     int k = 4,m = 1,p1,p2;
 7     
 8     p1 = func(k,m);
 9     p2 = func(k,m);
10     printf("%d %d\n",p1,p2);
11     
12     return 0;
13 }
14 
15 int func(int a,int b)
16 {
17     static int m = 0,i = 2;
18     
19     i += m+1;
20     m = i+a+b;;
21     return m;
22 }

实验2-2 运行结果

3、实验3

实验3 源代码

 1 #include<stdio.h>
 2 long long func(int n);
 3 
 4 int main()
 5 {
 6     int n;
 7     long long f;
 8     while(scanf("%d",&n) != EOF){
 9         f = func(n);
10         printf("n = %d,f = %lld\n",n,f);
11     }
12     
13     return 0;
14 }
15 long long func(int n)
16 { 
17     long long x;
18     if(n == 0){
19         x = 0;
20     }
21     else{
22         x= (func(n-1)+1)*2-1;
23     }
24 
25     return x;
26 }

实验3 运行结果

4、实验4

实验4 源代码(迭代）

 1 int main()
 2 {
 3     int n,m;
 4     while(scanf("%d%d",&n,&m)!= EOF)
 5         printf("n = %d,m = %d, ans = %d\n",n,m,func(n,m));
 6         
 7     return 0;
 8 }
 9 int func(int n,int m)
10 {
11     int i,up=1,down=1,c;
12     if(n<m){
13         c=0;
14     }
15     else{
16     for(i=n;i>= n-m+1;--i){
17             up = up*i;
18         }
19         for(i=1;i<=m;++i){
20             down = down*i;
21         }
22         c= up/down;
23     }
24     return c;
25  } 

实验4 运行结果

实验4 源代码（递归）

 1 #include<stdio.h>
 2 int func(int n,int m);
 3 
 4 int main()
 5 {
 6     int n,m;
 7     while(scanf("%d%d",&n,&m)!= EOF)
 8         printf("n = %d,m = %d, ans = %d\n",n,m,func(n,m));
 9         
10     return 0;
11 }
12 int func(int n,int m)
13 {
14     int c;
15     if(n<m){
16         return 0;
17     }
18     else if(m==0||n==1&&m==1){
19         return 1;
20     }
21     else{
22         c = func(n-1,m)+func(n-1,m-1);
23         return c;
24     }
25 }

实验4 运行结果

5、实验5

实验5 源代码

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 void hanoi(unsigned int n,char from,char temp,char to);
 4 void moveplate(unsigned int n,char from,char to);
 5 static int time=0;
 6 int main()
 7 {
 8     unsigned int n;
 9     while(scanf("%u",&n) != EOF){
10         hanoi(n,'A','B','C');
11         printf("一共移动了%d次\n",time);
12         time = 0;//将每次的time重置为0，所以必不可少 
13     }
14     
15     return 0;
16 }
17 void hanoi(unsigned int n,char from,char temp,char to)
18 {
19     if(n==1)
20     moveplate(n,from,to);
21     else
22     {
23         hanoi(n-1,from,to,temp);
24         moveplate(n,from,to);
25         hanoi(n-1,temp,from,to);
26             
27     }
28 }
29 void moveplate(unsigned int n,char from,char to)
30 {
31     printf("%u:%c-->%c\n",n,from,to);
32     time++;
33 } 
34  

实验5 运行结果

6、实验6

实验6 源代码

 1 #include<stdio.h>
 2 #include<math.h>
 3 long func(long s);
 4 
 5 int main()
 6 {
 7     long s,t;
 8     
 9     printf("Enter a number:");
10     while(scanf("%ld",&s) != EOF){
11         t = func(s);
12         printf("new number is:%ld\n\n",t);
13         printf("Enter a number:");
14     }
15     return 0;
16  } 
17  
18 long func(long s){
19     long a=0,b,i=0;
20     while(s != 0){
21         b = s%10;
22         s = s/10;
23         if(b%2 != 0){
24             a += b*pow(10,i);
25             ++i;
26         }
27     }
28     return a;
29 }

实验6 运行结果