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- #include <cstdio>
- int a[100000000];
- int main(){
- int b,c,d;
- for(b=2;b<100000000;b++){
- if(a[b]==0){
- for(d=2;d*b<=100000000;b++){
- a[b*d]=1;
- }
- }
- }
- printf("Digite entero positivo o 0 para terminar\n");
- while(scanf("%d",&b) && b!=0){
- printf("Los primos menores o iguales a %d son:\n",b);
- for(c=2;c<=b;c++){
- if(a[c]==0){
- printf("%d\n",c);
- }
- }
- printf("Digite entero positivo o 0 para terminar\n");
- }
- }
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