int is_prime(int); void f(int); int main() { int n; scanf("%d",&n); f(n); } int is_prime(int a) { int i; for(i=2;i*i<=a;i++) { if(a%i==0) return(0); if(i*i>a) return(1); } } void f(int n) { int a,b,i,j; for(i=2;i<=n;i++) { a=i; if(is_prime(a)) { b=n-a; } if(is_prime(b)) { printf("%d=%d+%d",n,a,b); break; } } }
this code work with the number 4 and 6
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include
int is_prime(int);
void f(int);
int main()
{
int n;
scanf("%d",&n);
f(n);
}
int is_prime(int a)
{
int i;
for(i=2;i*i<=a;i++)
{
if(a%i==0)
return(0);
if(i*i>a)
return(1);
}
}
void f(int n)
{
int a,b,i,j;
for(i=2;i<=n;i++)
{
a=i;
if(is_prime(a))
{
b=n-a;
}
if(is_prime(b))
{
printf("%d=%d+%d",n,a,b);
break;
}
}
}
this code work with the number 4 and 6