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#include <stdio.h>
int main() {
	double x, sum = 0;
	while (EOF != scanf("%lf", &x)) 
	{
		sum += x;
	}
	printf("Summa %g", sum);
}

Success #stdin #stdout 0s 3344KB

stdin

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1 2.3 7 14

stdout

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Summa 24.3

https://ideone.com/6693Ox

Сумма всех действительных чисел из входного потока

language:

C++14 (gcc 8.3)

created:

visibility:

public

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