#include using namespace std; //two diff inputs of characters void call_chars(char in_letters_1[], char in_letters_2[], int N) { int i; cout << "Enter first letters; " << endl; for (i = 0; i < 15; i++) { cin >> in_letters_1[i]; } cout << "Enter second letters: " << endl; for (i = 0; i < 15; i++) { cin >> in_letters_2[i]; } } //conversion of chars to ints void Put_chars_to_int(char in_letters_1[], char in_letters_2[], int letter_nu_1[], int letter_nu_2[], int res1[], int res2[], int N) { int i; for (i = 0; i < 15; i++) { res1[i] = letter_nu_1[i] = in_letters_1[i]; res2[i] = letter_nu_2[i] = in_letters_2[i]; } } //Put numbers in Array void Get_Numbers_into_arr(int letter_nu_1[], int letter_nu_2[], int nu_in_arr1[], int nu_in_arr2[], int tiny_nu1[], int tiny_nu2[], int res1[], int res2[], int N) { int i, count1=0, count2=0, k1=0, k2=0, l1=0, l2=0; for (i = 0; i < 15; i++) { while (letter_nu_1[i] != 0) { nu_in_arr1[count1] = letter_nu_1[i] % 10; letter_nu_1[i] /= 10; count1++; } while (letter_nu_2[i] != 0) { nu_in_arr2[count2] = letter_nu_2[i] % 10; letter_nu_2[i] /= 10; count2++; } k1 = count1 - 1; while (res1[i] != 0) { tiny_nu1[l1] = nu_in_arr1[k1]; res1[i] /= 10; k1--; l1++; } k2 = count2 - 1; while (res2[i] != 0) { tiny_nu2[l2] = nu_in_arr2[k2]; res2[i] /= 10; k2--; l2++; } } } //Sort the numbers in the Arrays up to 20 digits void Output_arrs(int tiny_nu1[], int tiny_nu2[], int N) { int i; for (i = 0; i < 20; i++) { cout << tiny_nu1[i]; } cout << endl; for (i = 0; i < 20; i++) { cout << tiny_nu2[i]; } } //Adding both 20 digits Arrays void Arr_correction(int tiny_nu1[], int tiny_nu2[], int add[], int N) { int i, j, m=0; for (i = 19; i > -1; i--) { j = tiny_nu1[i] + tiny_nu2[i]; if (j < 10) { add[i + 1] = j; if (m == 1) { add[i + 1] += m; m = 0; } } else { add[i + 1] = (j - 10); if (m == 1) { add[i + 1] += m; } m = 1; } add[i] = m; } } void Print_Add_result(int add[], int N) { int i; for (i = 0; i < 21; i++) { cout << add[i]; } } int main(){ int letter_nu_1[30], letter_nu_2[30], nu_in_arr1[30], nu_in_arr2[30], tiny_nu1[30], tiny_nu2[30], i, res1[30], res2[30], add[30], N=30; char in_letters_1[30],in_letters_2[30]; call_chars(in_letters_1, in_letters_2, N); Put_chars_to_int(in_letters_1, in_letters_2, letter_nu_1, letter_nu_2, res1, res2, N); Get_Numbers_into_arr(letter_nu_1, letter_nu_2, nu_in_arr1, nu_in_arr2, tiny_nu1, tiny_nu2, res1, res2, N); Output_arrs(tiny_nu1, tiny_nu2, N); Arr_correction(tiny_nu1, tiny_nu2, add, N); cout << endl; Print_Add_result(add, N); cout << endl; return 0; }

Adding two 20 digits numbers of equivalent input chars(Chars to equivalent Nu into Array)