Answer / senthil

char num[10];

printf ("Enter the number: ");
gets(num);
printf("Entered number = %s\n", num);

if (strlen(num) != 4) // check for 4 digit including NULL
{
printf("Error: number not 4 digit");
}
else
{
printf("\ndifference = %d", (num[0]&0x0F) - (num[1]&0x0F) - (num[2]&0x0F) - (num[3]&0x0F));
}

Answer / jagan

i don't know pls give me response

Answer / nitin garg

int j,num,rem,diff=0;
printf("
Enter Digit
");
scanf("%d",&num);

while(num!=0)
{
rem=num%10;
j=rem+rem;
diff=diff-rem;
num=num/10;
}
diff=diff+j;
printf("
Difference of Digit is : %d",diff);

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