1., programming implementation, will be displayed all super prime Numbers between 1-1000, who is the super prime number is a prime, and itself as the number of primes,


Asked to use a custom function, this experiment I see for a long time, only to find the prime Numbers within 1000, I learned C is not very good, big help

CodePudding user response:

 # include & lt; stdio.h> 
#include  

Int is_prime (int num); 

Int main (void) 
{

int i; 
Int TMP. 

For (I=1; I & lt; 1000; I +=2) {
//printf (" I=% d \ n ", I); 
TMP=I; 
If (is_prime (TMP)) {
If (TMP & lt; 10) {
Printf (" % d ", I); 
continue; 
} 
While (TMP) {
{if (is_prime (TMP % 10)) 
TMP/=10; 
continue; 
} 
break; 
} 
If (TMP==0) 
Printf (" % d ", I); 
} 
} 

return 0; 

} 

Int is_prime (int num) 
{
int i; 

If (num & lt; 2) 
return 0; 

Int size=(int) SQRT (num); 
For (I=2; I & lt; The size of + 1; I++) 
If (num % I==0) 
return 0; 

return 1; 
} 

For your reference ~