Write a small program that reads from the standard input one line at a time until the end of file. Every line contains a single integer number (use atoi to extract the number). The program prints the...

Write a small program that reads from the standard input one line at a time until the end of file. Every line contains a single integer number (use atoi to extract the number). The program prints the sum of all these numbers. You do not need to write any functions. A simple main program is enough.

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