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  1. #include <math.h>
  2. #include <stdio.h>
  3.  
  4. int main() {
  5.     int num, aux, cont;
  6.     aux = 0;
  7.     printf("digite um nume:\n");
  8.     scanf("%i", &num);
  9.  	for (int i = num; i >= 2; --i) {
  10.  		cont = 0;
  11. 		for (int j = 2; j < sqrt(i) + 1; ++j) {
  12. 			if (i % j == 0)	{
  13. 		        cont++;
  14.                 break;
  15. 			}
  16. 		}
  17. 		if (cont == 0) {
  18. 			aux = i;
  19. 			break;
  20. 		}
  21. 	}
  22. 	printf("O maior numero primo entre 0 e %d sera %d", num, aux);
  23. }
  24.  
  25. //https://pt.stackoverflow.com/q/50491/101
Success #stdin #stdout 0s 9424KB
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stdin
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100
stdout
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digite um nume:
O maior numero primo entre 0 e 100 sera 97
https://ideone.com/c4PFwH
language:
C99 (gcc 8.3)
created:
6 years ago
visibility:
public

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