实验3

实验任务1

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<windows.h>
#define N 80
void print_text(int line , int co1 ,char text[]);
void print_spaces(int n);
void print_blank_lines(int n);
int main()
{
 int line,co1,i;
 char text[N] ="hi,November~";
 srand(time(0));
 for(i = 1;i<=10;i++){
  line = rand()%25;
  co1 = rand()%80;
  print_text(line,co1,text);
  Sleep(1000);
 }
 return 0;
}
void print_spaces(int n) {
int i;
for(i = 1; i <= n; ++i)
printf(" ");
}
 void print_blank_lines(int n) {
int i;
for(i = 1; i <= n; ++i)
printf("\n");
}
 void print_text(int line, int col, char text[]) {
print_blank_lines(line-1);
print_spaces(col-1);
printf("%s", text);
}

实验任务2

#include <stdio.h>
long long fac(int n); // 函数声明
int main() {
int i, n;
printf("Enter n: ");
scanf("%d", &n);
for (i = 1; i <= n; ++i)
printf("%d! = %lld\n", i, fac(i));
return 0;
}
long long fac(int n) {
static long long p = 1;
printf("p = %lld\n", p);
p = p * n;
return p;
}

#include <stdio.h>
int func(int, int); // 函数声明
int main() {
int k = 4, m = 1, p1, p2;
p1 = func(k, m); // 函数调用
p2 = func(k, m); // 函数调用
printf("%d, %d\n", p1, p2);
return 0;
}
int func(int a, int b) {
static int m = 0, i = 2;
i += m + 1;
m = i + a + b;
return m;
}

实验任务3

#include<stdio.h>
long long func(int n);
int main(){
 int n;
 long long f;
 
 while(scanf("%d",&n)!=EOF){
  f= func(n);
  printf("n = %d,f = %lld\n",n,f);
 }
 
 return 0;
}
long long func(int n){
 long long int ans;
 if(n==1)
 ans=1;
 else
 ans=2*(func(n-1)+1)-1;
 return ans;
}

 实验任务4

4.1

#include<stdio.h>
int func(int n,int m);
int main(){
 int n,m;
 
 while(scanf("%d%d",&n,&m)!=EOF)
     printf("n =%d, m = %d, ans = %d\n",n,m,func(n,m));
    
     return 0;
}
int func(int n,int m){
 int x=1;
 int y=1;
 int z=1;
 int i,j,q,ans;
 ans=0;
 if(n<m)
 ans=0;
 else if(n>=m)
{
 for(i=1;i<=n;i++)
 {
  x=x*i;
 }
  for(j=1;j<=m;j++)
 {
  y=y*j;
 }
  for(q=1;q<=(n-m);q++)
 {
  z=z*q;
 }
 ans=x*1.0/(y*z);
}
 return ans;
 
}

 4.2

#include<stdio.h>
int func(int n,int m);
int main(){
 int n,m;
 
 while(scanf("%d%d",&n,&m)!=EOF)
     printf("n =%d, m = %d, ans = %d\n",n,m,func(n,m));
    
     return 0;
}
int func(int n,int m)
{
    int ans;
    if(n<m)
    return 0;
    else if(n==m)
    ans = 1;
    else if(m==1)
    ans = n;
    else
    ans = func(n-1,m)+func(n-1,m-1);
    return ans;
}

实验任务5

#include<stdio.h>
#include<stdlib.h>
void hanoi(unsigned int n,char from,char temp,char to);
void moveplate(unsigned int n,char from,char to);
long long func(int n);
int main()
{
 unsigned int n;
 while(scanf("%u",&n)!=EOF){
  hanoi(n,'A','B','C');
  printf("一共移动了%d次\n",func(n));
 }
 system("pause");
 return 0;
}
long long func(int n){
 long long int ans;
 if(n==1)
 ans=1;
 else
 ans=2*(func(n-1)+1)-1;
 return ans;
}
void hanoi(unsigned int n,char from,char temp,char to)
{
 if(n==1)
     moveplate(n,from,to);
 else
 {
  hanoi(n-1,from,to,temp);
  moveplate(n,from,to);
  hanoi(n-1,temp,from,to);
 }
}
void moveplate(unsigned int n,char from,char to)
{
 printf("%u:%c--->%c\n",n,from,to);
}
 

 实验任务6

#include <stdio.h>
#include <math.h>
long func(long s);
int main() {
    long s, t;
    printf("Enter a number: ");
while (scanf("%ld", &s) != EOF) {
    t = func(s);
    printf("new number is: %ld\n\n", t);
    printf("Enter a number: ");
    }
return 0;
}

long func(long s){
    int ans,answ=0;
    ans=0;
    while(s*1.0/10!=0)
    {
    if((s%10)%2==1)
    {
        ans=ans*10+s%10;
    }
    s=s/10; 
    }
    while(ans*1.0/10!=0)
    {
        answ=answ*10+ans%10;
        ans=ans/10;
    }
    return answ;
}