> #include <stdio.h>
> #include <math.h>
> void setBuffer(int a[], int lenth);
> int s[78497];
> int main ( void )
> {
> 	long int n = 0;
> 	long int i, j;
> 	setBuffer(s, 78497);
> 	
> 	while ( scanf("%d", &n) == 1 && n )
> 	{
> 		for ( i = 0; i < n; i ++ )
> 		{
> 			
> 			for ( j = (78496>n)?n:78496; j > i; j -- )
> 			{
> 				if ( s[i] + s[j] == n )
> 				{
> 					printf("%d = %d + %d\n", n, s[i], s[j]);
> 					n = 0;
> 					break;
> 				}
> 				if ( s[i] + s[j] < n )
> 					break;
> 			}
> 		}
> 	}
> 	return 0;
> }
> void setBuffer(int a[], int lenth)
> {
> 	FILE *fp = NULL;
> 	long int i = 0;
> 	fp = fopen("s.txt", "r"); //这个文件保存了1000000以内的奇素数
> 	for ( i = 0; i < lenth; i ++ )
> 		fscanf(fp, "%d", &a[i]);
> 	fclose(fp);
> }