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

void main()
{
    for(char c='A';c<='Z';c++){
      printf("\nASCII of %c is %i\n", a, a); 
    }
    getch();
}

C Binary Search

#include<stdio.h>

  int binary_search(char *items, int count, char key)
  {
    int low, high, mid;

    low = 0; high = count-1;
    while(low <= high) {
      mid = (low+high)/2;
      if(key < items[mid]) 
          high = mid-1;
      else if(key > items[mid]) 
          low = mid+1;
      else 
          return mid; /* found */
    }
    return -1;
  }

  int main(void){
     char *str = "123456";

     int index = binary_search(str, 6, '3');

     printf("%d",index);
  }