A=1,B=2,C=3,..........         C A T=3+1+20=24

#include<stdio.h>
#include<ctype.h>
#include<string.h>
#include<conio.h>
void main()
{
  char a[100];int i,l=0,b[100],s=0;
  printf("\nEnter word: ");
  gets(a);
  l=strlen(a);
  for(i=0;i<l;i++)
 
{
 if(isupper(a[i]))
  b[i]=a[i]-64;                 /*ASCII value of capital A is 65.So for A to be 1 subtract 64*/
 if(islower(a[i]))
  b[i]=a[i]-96;                 /*ASCII value of small a is 97.So for a to be 1 subtract 96*/
 printf("\n%c : %d",toupper(a[i]),b[i]);
 }
printf("\n   _____");

 for(i=0;i<l;i++)
  s=s+b[i];
printf("\n    %d",s);
printf("\n   _____");
getch();
}
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