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If you're reading the numbers sequentially, keep a running total. Alternatively, pass all the numbers to a function using a variable-length argument. Alternatively push the numbers into a vector then sum the vector with the following function:

void sum_vector(std::vector<int> a)

{

int total=0;

for(int i=0; i<a.size(); ++i)

total+=a[i];

return(total);

}

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