al7_4.c

里面告诉了许多你编程用的方法和例子

/*案例代码文件名：AL7_4.C*/
/*功能：函数的嵌套调用*/
#define K 4
#define N 5
long  f1(int n,int k)		/*计算n的k次方*/
      	{long power=n;
         int i;
         for(i=1;i<k;i++)  power *= n;
         return power;
      	}
long  f2(int n,int k)		/*计算1到n的k次方之累加和*/
      	{long sum=0;
         int i;
         for(i=1;i<=n;i++)  sum += f1(i, k);
         return sum;
      	}
main()
      	{printf("Sum of %d powers of integers from 1 to %d = ",K,N);
         printf("%d\n",f2(N,K));
         getch();
      	}