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- #include <stdio.h>
- #include <stdlib.h>
- #define MAX_NUMBER 1024
- void init_array(int []);
- void filter_array(int []);
- void show_true_array(int []);
- main(){
- int array[MAX_NUMBER];
- init_array(array);
- filter_array(array);
- show_true_array(array);
- return 0;
- }
- void init_array(int array[]){
- int i;
- for(i=0;i<MAX_NUMBER;i++)
- array[i]=1;
- }
- void filter_array(int array[]){
- int i, j;
- for(i=2;i<=MAX_NUMBER;i++)
- for(j=2*i;j<=MAX_NUMBER;j+=i)
- array[j-1]=0;
- }
- void show_true_array(int array[]){
- int i;
- for(i=0;i<MAX_NUMBER;i++)
- (array[i]!=1)?:printf("%d\n", i+1);
- }
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