Wu Yuxiong - natural born C language development: Recursive

void recursion () 
{ 
   statements; 
   ... ... ... 
   recursion (); / * function calls itself * / 
   ... ... ... 
} 
 
int main () 
{ 
   recursion (); 
}

#include <stdio.h>
 
double factorial(unsigned int i)
{
   if(i <= 1)
   {
      return 1;
   }
   return i * factorial(i - 1);
}
int  main()
{
    int i = 15;
    printf("%d 的阶乘为 %f\n", i, factorial(i));
    return 0;
}

#include <stdio.h>
 
int fibonaci(int i)
{
   if(i == 0)
   {
      return 0;
   }
   if(i == 1)
   {
      return 1;
   }
   return fibonaci(i-1) + fibonaci(i-2);
}
 
int  main()
{
    int i;
    for (i = 0; i < 10; i++)
    {
       printf("%d\t\n", Fibonaci (i)); 
    } 
    Return  0 ; 
}

 

#include <stdio.h> 
#include <stdarg.h> Double Average ( int num, ...) 
{ 
    the va_list valist; Double SUM = 0.0 ;
     int I; / * to num parameter initialization valist * / 
    the va_start (valist, NUM); / * access the parameters of all assigned valist of * / for (I = 0 ; I <NUM; I ++ ) 
    { 
       SUM + = the va_arg (valist, int ); 
    } / * clean up the memory of valist reserved * / 
    to va_end ( valist); return SUM / NUM; 
}
 

 
    
 
    
 
    
    
    
 
    
 
int main()
{
   printf("Average of 2, 3, 4, 5 = %f\n", average(4, 2,3,4,5));
   printf("Average of 5, 10, 15 = %f\n", average(3, 5,10,15));
}