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integration.c
Package: C语言精彩编程百例_源代码.rar [view]
Upload User: bjtelijie
Upload Date: 2010-01-01
Package Size: 87k
Code Size: 1k
Category:
Algorithm
Development Platform:
Visual C++
- # include <math.h>
- # include <stdio.h>
- void main( )
- {
- int i, j, num;
- int p, q, flagp, flagq;
- printf("Please input a plus integer: ");
- scanf("%d", &num);
- /* 代码 (num%2)!=0) 表示num不能被2整除 */
- if(((num%2)!=0) || (num<=4))
- printf("input data error!n");
- else
- {
- p = 1;
- /* do-while循环体 */
- do {
- p = p + 1;
- q = num - p;
- flagp = 1;
- flagq = 1;
- /* for循环体 */
- for(i=2; i<=(int)(floor(sqrt((double)(p)))); i++)
- {
- if((p%i) == 0)
- {
- flagp = 0;
- break;
- }
- }
- /* while循环体 */
- j = 2;
- while(j <= (int)(floor(sqrt((double)(q)))))
- {
- if ((q%j) == 0)
- {
- flagq = 0;
- break;
- }
- j++;
- }
- } while (flagp*flagq == 0);
- printf("%d = %d + %d n", num, p, q);
- }
- }