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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int main()
  5. {
  6.     int i,j,MAXVAL=100;
  7.     char *primes = (char*)malloc(MAXVAL*sizeof(char));
  8.     primes[0]=primes[1]=0;
  9.     for(i=2;i<MAXVAL;i++)
  10.       primes[i]=1;
  11.  
  12.     for (i=2;i<MAXVAL;i++)
  13.     {
  14.     if(primes[i])
  15.     for(j=i*2;j<MAXVAL;j+=i)
  16.      primes[j]=0;
  17.     }
  18.  
  19.     for(i=0;i<MAXVAL;i++)
  20.         if(primes[i])
  21.             printf("%d ",i);
  22.     printf("\n");
  23.     return 0;
  24. }
Success #stdin #stdout 0s 1964KB
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stdin
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Standard input is empty
stdout
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2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97
https://ideone.com/ncXu3t
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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