/* Program# 50
   date : 28-12-2008
   while loop- Prints Odd & Even numbers between given range
*/

#include <stdio.h>
main(){
int a,b,c=0;
printf("Enter two numbers :");
scanf("%d %d",&a,&b);
while(a<=b){
c=a%2;
if(!c)
printf("\n Even no:%d",a);
else
printf("\n odd no:%d",a);
a=a+1;
}
}

$ gcc p50.c  

Now the executable file is stored as a.out, to run
the program,

$ ./a.out
Enter two numbers :50 60

 Even no:50
 odd no:51
 Even no:52
 odd no:53
 Even no:54
 odd no:55
 Even no:56
 odd no:57
 Even no:58
 odd no:59
 Even no:60
$