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  1. #include <stdio.h>
  2. int main(void) {
  3. 	int num, i;
  4. 	int count = 0;
  5. 	for(num=2; num<=100; num++) {
  6. 		for(i=2; i<num; i++) {
  7. 			if(num%i==0)
  8. 			break;
  9. 		}
  10. 		if(num==i)
  11. 		count++;
  12. 	}
  13. 	printf("1~100까지의 소수는 %d개이다.", count);
  14. }
Success #stdin #stdout 0s 5284KB
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1~100까지의 소수는 25개이다.
https://ideone.com/6ayIsH
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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