Write the missing functions.

(DO NOT USE ARRAYS) Indexing is allowed.C++ strings are to be used with restictions to only use the string length function.

int main() { //Read in the bit pattern size int L; do { cout << "Enter positive integer for the bit pattern size "; cin >> L; } while (L <= 0); //Read in two integers a and b int a, b; cout << "Enter an integer a "; cin >> a; cout << "Enter an integer b "; cin >> b; //Calculate the decimal arithmetic sum of a and b and print the result int c1 = a + b; cout << "In decimal " << a << " + " << b << " is " << c1 << endl; //Compute the two's complement representations of a and b //Each integer must be represented in L-bits pattern //Also these two's complement representations must be returned as string data types string A = decimalToTwocomplementString(a, L); string B = decimalToTwocomplementString(b, L); //Print the two's complement representations of a and b cout << "The two's complement of " << a << " is\t " << A << endl; cout << "The two's complement of " << b << " is\t " << B << endl; //Compute the binary sum of the two's complement representations of a and b //The result must be returned as L-bit pattern string data type string C = TwoComplementStringAddition(A, B); //Print the two's complement representation binary sum cout << "The binary sum of " << A << " and " << B << " is " << C << endl; //Convert the two's complement representation binary sum to decimal and print int c2 = TwoComplementStringToDecimal(C); cout << "In two's complement arithmetic, " << a << " + " << b << " is " << c2 << endl; //Print some concluding results if (c1 == c2) cout << c1 << " is equal to " << c2 << ". Good Job!" << endl; else { cout << c1 << " is not equal to " << c2 << endl; cout << "Either " << c1 << " cannot be represented by the given bit pattern OR we have made some mistake!" << endl; } system("Pause"); return 0; } Write the missing code using strings only( NO ARRAYS ALLOWED). Indexing can be used. String function str.length() is the only one to be used. DO NOT MODIFY THE MAIN PROGRAM.

int main() { //Read in the bit pattern size int L; do { cout << "Enter positive integer for the bit pattern size "; cin >> L; } while (L <= 0); //Read in two integers a and b int a, b; cout << "Enter an integer a "; cin >> a; cout << "Enter an integer b "; cin >> b; //Calculate the decimal arithmetic sum of a and b and print the result int c1 = a + b; cout << "In decimal " << a << " + " << b << " is " << c1 << endl; //Compute the two's complement representations of a and b //Each integer must be represented in L-bits pattern //Also these two's complement representations must be returned as string data types string A = decimalToTwocomplementString(a, L); string B = decimalToTwocomplementString(b, L); //Print the two's complement representations of a and b cout << "The two's complement of " << a << " is\t " << A << endl; cout << "The two's complement of " << b << " is\t " << B << endl; //Compute the binary sum of the two's complement representations of a and b //The result must be returned as L-bit pattern string data type string C = TwoComplementStringAddition(A, B); //Print the two's complement representation binary sum cout << "The binary sum of " << A << " and " << B << " is " << C << endl; //Convert the two's complement representation binary sum to decimal and print int c2 = TwoComplementStringToDecimal(C); cout << "In two's complement arithmetic, " << a << " + " << b << " is " << c2 << endl; //Print some concluding results if (c1 == c2) cout << c1 << " is equal to " << c2 << ". Good Job!" << endl; else { cout << c1 << " is not equal to " << c2 << endl; cout << "Either " << c1 << " cannot be represented by the given bit pattern OR we have made some mistake!" << endl; } system("Pause"); return 0; }