Common operation utilities for C++ Vectors

vectorOps.cpp

void printVector(vector<int> vect){
    cout<<"< ";
    for (unsigned int i: vect){
        std::cout << i << ' ';
    }
    cout<<">"<<endl;
}

// Element-wise Multiplication of a vector with a Scalar
vector<int> scalarMultipleVect(vector<int> vect, int scalar){
    int n = vect.size();
    int carry= 0;
    for(int i = 0; i<n; i++){
        vect[i] = vect[i]*2 + carry;
        carry = 0;
        if(vect[i] >= 10){
            carry = 1;
            vect[i] -= 10;
            if(i == n-1){
                vect.push_back(carry);
            }
        }
    }
    return vect;
}

// Addition of 2 vectors where
// Left has the least significant digit and Right has the Most signifigant digit
// E.g. :
// <0, 2, 4> represents 420
// <6, 5, 4, 3, 2, 1> represents 123,456 
vector<int> addVect(vector<int> a, vector<int> b){
    bignum sum = b;

    int carry = 0;
    for(int i = 0; i < sum.size(); i++){
        if(i<a.size()){
            sum[i] += a[i];
        }
        sum[i] += carry;
        
        // handle overflow
        if(sum[i] >= 10){
            carry = 1;
            sum[i] -= 10;
        }
        else{
            carry = 0;
        }
    }

    // If Largest Digit overflowing
    if(carry != 0){
        sum.push_back(carry);
    }

    return sum;
}