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- #include<stdio.h>
- #include<math.h>
- #define mod %
- int main()
- {
- unsigned char flag,counter=0,rows=0;
- long unsigned int number,i,j;
- printf("\n\t Enter your number:");
- scanf("%du",&number);
- for(i=1;i<=(long unsigned int)abs(number);i++)
- {
- flag=0;
- j=2;
- while(j<=(long unsigned int)sqrt(i))
- {
- if(i mod j==0)
- {
- flag=1;
- break;
- }
- j++;
- }
- if(flag==0)
- {
- printf("%10lu",i);
- counter++;
- if(counter==10)
- {
- printf("\n");
- counter=0;
- rows++;
- }
- if(rows==20)
- {
- rows=0;
- printf("\n\t\t Press any key to view next page... \n");
- }
- }
- }
- printf("\n");
- return 0;
- }