PROGRAMMING:Find the sum of three integers
Write a program to find the sum of three integers.
(1) Use only the main function.
(2) By seeking the sum of two integers function to achieve (their own design function).
###Input format:
There are several groups of test data, which are processed to the end of the file. Input three integers a, B, C in the same line for each group of test data.
###Output format:
Each group outputs the sum of a, B and C.
###Input example:
Here is a set of inputs. For example:
```in
1 2 3
```
###Output example:
The corresponding output is given here. For example:
```out
six
```
answer：If there is no answer, please comment
(1) Use only the main function.
(2) By seeking the sum of two integers function to achieve (their own design function).
###Input format:
There are several groups of test data, which are processed to the end of the file. Input three integers a, B, C in the same line for each group of test data.
###Output format:
Each group outputs the sum of a, B and C.
###Input example:
Here is a set of inputs. For example:
```in
1 2 3
```
###Output example:
The corresponding output is given here. For example:
```out
six
```
answer：If there is no answer, please comment