C Program to find Number of Three Digits Numbers Greater Than 100

Q. Write a C Program to find the number of three digit numbers greater than 100 in which digits appear in strictly increasing order.
e.g. 123, 124, 125, 134, 135, 136, 145, 146, 147,….,689,789. (IIT-JAM-2011)

Source Code:

#include <stdio.h>
#include <conio.h>

int main(void)
{
int i,j,k,temp=0;
clrscr();
for(i=1;i<=9;i++)
{
         for(j=1;j<=9;j++)
         {
                for(k=1;k<=9;k++)
                {
                      if(i<j && j<k)
                      {
                      temp++;
                      printf("\n\n\t Count %d : %d%d%d",temp,i,j,k);
                      }
                }
         }
}
getch();
return 0;
}

Output:

Fig.: C Program to find the number of three digit numbers greater than 100 in which digits appear in strictly increasing order.

Version/Compatibility: Turbo C++ Version 3.0 (Borland International, Inc.)

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