要发就发

#include <stdio.h>
#include <stdlib.h>
#include<math.h>
#define NUM 320
int number[NUM];
int prime(int m);
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	int i, j, count = 0;
	for(j=0, i=3; i<=1993; i+=2)
	if(prime(i))
		number[j++] = i;
		for(j--; number[j]>1898; j--)
		{
			for(i=0; number[j]-number[i]>1898; i++)
				if(number[j]-number[i]==1898)
				printf("%d.%3d,%d\n",++count, number[i], number[j]);
		}
	return 0;
}
int prime(int m)
{
	int i;
	int k = sqrt(m);
	for(i=2; i<=k; i++)
		if(m%i==0)
			return 0;
		return 1;
}