实验三
1.任务1
#include <stdio.h> #include <stdlib.h> #include <time.h> #include <windows.h> #define N 80 void print_text(int line, int col, char text[]); // 函数声明 void print_spaces(int n); // 函数声明 void print_blank_lines(int n); // 函数声明 int main() { int line, col, i; char text[N] = "hi, April~"; srand(time(0)); // 以当前系统时间作为随机种子 for(i = 1; i <= 10; ++i) { line = rand() % 25; col = rand() % 80; print_text(line, col, text); Sleep(1000); // 暂停1000ms } return 0; } // 打印n个空格 void print_spaces(int n) { int i; for(i = 1; i <= n; ++i)] printf(" "); } // 打印n行空白行 void print_blank_lines(int n) { int i; for(i = 1; i <= n; ++i) printf("\n"); } // 在第line行第col列打印一段文本 void print_text(int line, int col, char text[]) { print_blank_lines(line-1); // 打印(line-1)行空行 print_spaces(col-1); // 打印(col-1)列空格 printf("%s", text); // 在第line行、col列输出text中字符串 }
这个程序实现的功能是在25行，80列的屏幕上随机生成10个不同位置的hi,April~文本，每一次输出时间间隔为1秒，实现动态输出
2.任务2
2.1
1 #include <stdio.h> 2 #include<stdlib.h> 3 long long fac(int n); 4 5 int main() { 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 system("pause"); 14 15 16 return 0; 17 } 18 19 long long fac(int n) { 20 static long long p = 1; 21 22 p = p * n; 23 24 25 return p; 26 }
2.2
1 #include <stdio.h> 2 #include<stdlib.h> 3 int func(int,int); 4 5 int main() { 6 int k=4,m=1,p1,p2; 7 p1=func(k,m); 8 p2=func(k,m); 9 printf("%d,%d\n",p1,p2); 10 system("pause"); 11 return 0; 12 } 13 14 15 int func(int a,int b){ 16 static int m=0,i=2; 17 i+=m+1; 18 m=i+a+b; 19 20 21 return m; 22 }
3.任务3
1 #include<stdio.h> 2 #include<stdlib.h> 3 long long func(int n); 4 int main(){ 5 int n; 6 long long f; 7 while(scanf("%d",&n)!=EOF){ 8 f=func(n); 9 printf("n=%d,f=%lld\n",n,f); 10 } 11 system("pause"); 12 return 0; 13 } 14 long long func(int n){ 15 static long long p; 16 if(n==0) 17 p=0; 18 else 19 p=2*func(n-1)+1; 20 return p; 21 }
4.任务4
1 #include<stdio.h> 2 #include<stdlib.h> 3 int func(int n,int m); 4 int main(){ 5 int n,m; 6 7 while(scanf("%d%d",&n,&m)!=EOF) 8 printf("n=%d,m=%d,ans=%d\n",n,m,func(n,m)); 9 system("pause"); 10 return 0; 11 } 12 int func(int n,int m){ 13 int i,j,k,p=1,q=1,g=1; 14 if(n<m) 15 return 0; 16 else if(n==m||m==0) 17 return 1; 18 else 19 for(i=1;i<=n;i++) 20 p=p*i; 21 for(j=1;j<=m;j++) 22 q=q*j; 23 for(k=1;k<=(n-m);k++) 24 g=g*k; 25 return p/(g*q); 26 }
1 #include<stdio.h> 2 #include<stdlib.h> 3 int func(int n,int m); 4 int main(){ 5 int n,m; 6 7 while(scanf("%d%d",&n,&m)!=EOF) 8 printf("n=%d,m=%d,ans=%d\n",n,m,func(n,m)); 9 system("pause"); 10 return 0; 11 } 12 int func(int n,int m){ 13 if(n<m) 14 return 0; 15 else if(n==m||m==0) 16 return 1; 17 else 18 return func((n-1),m)+func((n-1),(m-1)); 19 }
5.任务5
1 #include<stdio.h> 2 #include<stdlib.h> 3 #include<math.h> 4 void hanoi(unsigned int n,char from,char temp,char to); 5 void moveplate(unsigned int n,char from,char to); 6 int main(){ 7 unsigned int n; 8 int i; 9 while(scanf("%u",&n)!=EOF){ 10 hanoi(n,'A','B','C'); 11 i=pow(2.0,n*1.0)-1; 12 printf("\n一共移动了%d次.\n",i); 13 } 14 system("pause"); 15 return 0; 16 } 17 void hanoi(unsigned int n,char from,char temp,char to){ 18 if(n==1) 19 moveplate(n,from,to); 20 else 21 { 22 hanoi(n-1,from,to,temp); 23 moveplate(n,from,to); 24 hanoi(n-1,temp,from,to); 25 } 26 } 27 void moveplate(unsigned int n,char from, char to){ 28 printf("%u:%c-->%c\n",n,from, to); 29 }
6.任务6
1 #include<stdio.h> 2 #include<stdlib.h> 3 #include<math.h> 4 long func(long s); 5 int main(){ 6 long s,t; 7 printf("Enter a number:"); 8 while(scanf("%ld",&s)!=EOF){ 9 t=func(s); 10 printf("new number is:%ld\n\n",t); 11 printf("Enter a number:"); 12 } 13 system("pause"); 14 return 0; 15 } 16 long func(long s){ 17 int p,t=1,ans=0; 18 while(s!=0){ 19 p=s%10; 20 if(p%2==1){ 21 ans=ans+p*t; 22 t=t*10; 23 } 24 s=s/10; 25 } 26 return ans; 27 }
