Сравнение элементов строк с разными длинами

#include <iostream>
#include <string>
#include <sstream>
using namespace std;
 
bool longNumber(string number)
{
bool minus = number.length() > 0 && number[0] == '-';
bool dot = false;
int dot_position = 0;
for(int i = 0; i< number.length();i++){
    if (number[i] == '.'){
        dot = true;
        dot_position = i;
    }
}
bool ok = true;
int int_start = minus ? 1:0;
int int_end = dot ? dot_position: number.length();
for (int i = int_start; i < int_end; i++){
    if(number[i] < '0' || number[i] > '9') return false;
}
 
int frac_start = dot ? dot_position + 1 : number.length();
for (int i = frac_start; i < number.length();i++) {
    if (number[i] < '0' || number[i] > '9') return false;
}
if ( (int_end - int_start) + (number.length() - frac_start) == 0 ) return false;
 
return true;
}
 
bool plus_minus (string number1)
{
if (number1[0] == '-') return true;
return false;
}
 
int dot_pos (string number)
{
int dot_position = 0;
dot_position = number.find('.') ;
//if (dot_position == -1 ) dot_position =0;
return dot_position;
}
 
string intPart (string number, bool minus, int dot)
{
int int_start = minus ? 1:0;
int int_end;
if (dot == -1 ) {
int_end = number.length();
} else int_end = dot;
string intfraction = "";
    for (int i = int_start; i < int_end; i++){
    intfraction += number[i];
}
return intfraction;
}
 
string fractionPart (string number, int dot)
{
string frac_fraction = "";
    if (dot == -1) {frac_fraction = "0";
    return frac_fraction;
    }
 
if (dot == -1) {return frac_fraction;
} else {
for (int i = dot+1; i < number.length();i++) {
    frac_fraction += number[i];
}
}
if (frac_fraction == "") frac_fraction = "0";
return frac_fraction;
}
 
string cut_string (string number)
{
int nonzero_pos = 0;
string short_string = "";
for (int i = 0; i < number.length(); i++){
if (number[i] != '0') {
        nonzero_pos = i;
        break;
       }
}
for (int i = nonzero_pos; i < number.length(); i++){
short_string += number[i];
}
if (short_string == "") short_string = "0";
return short_string;
}
 
int min (int num1, int num2)
{
int minimum = (num1 < num2) ? num1 : num2;
return minimum;
}
 
int max (int num1, int num2)
{
int minimum = (num1 < num2) ? num1 : num2;
return minimum;
}
 
int surplus_check (string number)
{
string surplus="";
int check=0;
for (int i = 0; i < number.length();i++) {
    surplus += number[i];
}
for (int i = 0; i < number.length();i++) {
    if (surplus[i] != '0') check++;
}
if (check != 0 )return 1;
return 0;
}
 
int equal_length_strings_comparasion (string number1, string number2)
{
for (int i = 0; i < number1.size(); i++ )
{
    if (number1[i] == number2[i]) {
        continue;
    }else if (number1[i] > number2[i]) {
        return  1;
    }else if (number1[i] < number2[i]){
        return -1;
    }
}
 return 0;
}
 
int non_equal_strings_comparasion (string number1, string number2)
{
int minimum = min(number1.size(), number2.size());
int maximum = max(number1.size(), number2.size());
int count_del_symbol = maximum - minimum;
string max_line ="";
string substrok ="";
string min_line = "";
 
if (maximum == number2.size()) {
max_line = number2;
min_line = number1;
}else if (maximum == number1.size()){
max_line = number1;
min_line = number2;
}
 
    for (int i = 0; i < minimum; i++ ){
    if (max_line[i] == min_line[i]) {
        continue;
    }else if (max_line[i] > min_line[i]) {
        return  1;
    }else if (max_line[i] < min_line[i]) {
        continue;
    }
}
 
 
if (maximum == number2.size()) {
substrok =  number2.erase(0, count_del_symbol);
}else if (maximum == number1.size()){
 substrok =  number1.erase(0, count_del_symbol);
}
}
 
 
 
int less_more_equal (string number1, string number2)
{
//-1 less  1 more  0 equal
bool sign1, sign2;
string integer_part1, integer_part2, fraction_Part1, fraction_Part2;
sign1 = plus_minus (number1);
sign2 = plus_minus (number2);
 
if (sign1 == 1 && sign2 == 0) return -1;
if (sign1 == 0 && sign2 == 1) return 1;
 
integer_part1 = cut_string(intPart(number1, sign1, dot_pos(number1)));
integer_part2 = cut_string(intPart(number2, sign2, dot_pos(number2)));
fraction_Part1 = fractionPart (number1, dot_pos(number1));
fraction_Part2 = fractionPart (number2, dot_pos(number2));
 
if (sign1 == 0 && sign2 == 0) {
int res =-1;
res = (number1.size() == number2.size()) ? equal_length_strings_comparasion (integer_part1, integer_part2) :
     non_equal_strings_comparasion (integer_part1, integer_part2);
 
if (res ==  1) return 1;
if (res == -1) return -1;
 
if (res ==  0){
int res2 = -1;
res2 = (number1.size() == number2.size()) ? equal_length_strings_comparasion (fraction_Part1, fraction_Part2) :
     non_equal_strings_comparasion (fraction_Part1, fraction_Part2);
 
    if (res2 == 1) return 1;
    if (res2 == 0) return 0;
    if (res2 == -1) return -1;
        }
} else if (sign1 == 1 && sign2 == 1) {
int res =-1;
res = (number1.size() == number2.size()) ? equal_length_strings_comparasion (integer_part1, integer_part2) :
     non_equal_strings_comparasion (integer_part1, integer_part2);
 
if (res ==  1) return -1;
if (res == -1) return 1;
 
if (res ==  0){
int res2 = -1;
res2 = (number1.size() == number2.size()) ? equal_length_strings_comparasion (fraction_Part1, fraction_Part2) :
     non_equal_strings_comparasion (fraction_Part1, fraction_Part2);
 
    if (res2 == -1) return 1;
    if (res2 == 0) return 0;
    if (res2 == 1) return -1;
        }
}
return -2;
}
 
int main () {
string num1, num2;
cout << "input numbers: ";
cin >> num1;
cout << endl;
cin >> num2;
 
 
 
bool n1 = longNumber(num1);
bool n2 = longNumber(num2);
if (n1 & n2 == 1) {
int ok = less_more_equal (num1, num2);
if ( ok == 1 ) cout << "more";
if ( ok == 0 ) cout << "equal";
if ( ok == -1 ) cout << "less";
} else {
cout << "bad number(/s)";
}
 
}