用c语言验证哥德巴赫猜想

#include <stdio.h>

int Is_Primer(int num)
{
int i;
int pow_num;

pow_num = sqrt(num);
for(i = 2; i <= pow_num; i++)
{
if(0 == (num % i))
{
return -1;
}
}
return 0;
}

void Goldbach_Guess(int max_num)
{
int even;
int i;

printf("Goldbach is right:\n");
for(even = 2; even <= max_num; even += 2)
{
for(i = 1; i < even; i++)
{
if(0 == Is_Primer(i))
{
if(0 == Is_Primer(even - i))
{
printf("%d + %d = %d\n", i, even - i, even);
break;
}
}
}
}
}

int main()
{
int max_num;

printf("Please input the max_num:\n");
scanf("%d", &max_num);

Goldbach_Guess(max_num);

return 0;
}