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Goldbach conjecture C language
2022-07-07 08:52:00 【Please Sit Down】
#include <stdio.h>
#include <conio.h>
int prime(int n){
int k, flag = 1;
for (k = 2; k <= n/2 + 1; k++)
if (n % k == 0){
flag = 0 ;
break;
}
return flag;
}
void main(){
int num, a;
// clrscr();
do{
printf("Please input an even number:");
scanf("%d", &num);
} while (num <= 6 || num % 2 == 1);
for (a = 2; a <= num / 2 + 1; a++)
if (prime(a) && prime(num - a))
printf("\n %d = %d + %d ", num, a, num - a);
}
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