实验3

实验任物二-------静态修饰后，P在fac第二次运行时不重置，再次与i相乘实现阶乘

 

#include <stdio.h>

int func(int, int);

int main() {
int k = 4, m = 1, p1, p2;
p1 = func(k, m); 
p2 = func(k, m); 
printf("%d, %d\n", p1, p2);
return 0;
}

int func(int a, int b) {
static int m = 0, i = 2;

i += m + 1;     //  i=3  m=0           //  i=12  m=8
m = i + a + b;  //  i=3  m=8=p1        //  i=12  m=17=p2

return m;
}

 

#include <stdio.h>

long long func(int n)
{
    long long ans;
    if(n == 1)
    {   ans = 1;  }
    else
    {   ans = (func(n-1)+1)*2 - 1;   }
    
    return ans;
}

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;

 

}

#include <stdio.h>

int func(int n, int m)
{
    int up,down,i;
    i = n-m+1;
    
    for(up=1; n>=i; n--)
    {    up *= n;    }
    for(down=1; m>0; m--)
    {   down *= m;    }
    
    up /= down;
    return up;
}

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;

 

}

#include <stdio.h>

int func(int n, int m)
{
    int ans;
    if(m > n)
    {    ans = 0;   return ans;   }
    else if(m == n)
    {    ans = 1;   return ans;   }
    else if(m == 0)
    {    ans = 1;   return ans;   }
    else if(m < n)
    {    ans = func(n-1,m) + func(n-1,m-1);   }
}

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;

 

}

#include <stdio.h>
#include <math.h>

void move(char a,char b)
{    printf("%c --> %c\n",a,b);   }

void hanoi(int n,char A,char B,char C)
{
    if(n == 1)
    {    move(A,C);    }
    else
    {
        hanoi(n-1,A,C,B);   // A n-1至C 用B 
        move(A,C);          // A剩1至C   
        hanoi(n-1,B,A,C);   // B n-1值A 用C 
    }
}

int main()
{
    int N;
    while(scanf("%d",&N) != EOF)
    {
        int tol;
        tol = pow(2,N) - 1;
        
        hanoi(N,'A','B','C');
        printf("\n");
        printf("一共移动了%d次\n",tol);
        printf("\n");
    }
    
    return 0;

 

}

 

#include <stdio.h>
#include <math.h>
long func(long s)
{
    long ans = 0;   int i = 0;
    while(s != 0)
    {
        if(s%2 != 0)
        {
            ans += (s%10)*pow(10,i);
            i++;
            s /= 10;
        }
        else
        {    s /= 10;    }
    }
    return ans;
}
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;}