Code:
#include <stdio.h>


void getNumber(int *input)
{
printf("Enter an integer number:");
scanf("%d",input);
}


int incValue(int *val)
{
  if( *val>1 && *val<100 )
  {
    *val+=10;
  }
  else if (*val>101 & *val<1000){
    *val+=20;
    
  }
  else{
    *val+=25;
  }
  return val;
}


void doubleValue(int *val)
{
*val *= 2;
}




void main(void)
{
int number;
getNumber(&number);
doubleValue(&number);
printf("That value doubled is %d " ,number);


incValue(&number);
printf("That value incremented is %d " ,number);
}