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  1. #include<stdio.h>
  2. int main()
  3. {
  4.     int num,r1,d1,d2,r2,sum;
  5.     printf("enter a number:");
  6.     scanf("%d",&num);
  7.     while(num>99&&num<1000)
  8.     {
  9.        r1=num/100; 
  10.       d1=num%10;
  11.       d2=r1/10;
  12.       r2=r1%10;
  13.       sum=d1+d2+r2;
  14.     }
  15.     printf("sum of three digits=%d",sum);
  16.    return 0;
  17. }
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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enter a number:sum of three digits=0
https://ideone.com/LQAw8S
language:
C++ 4.3.2 (gcc-4.3.2)
created:
8 days ago
visibility:
public

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