Compile c++ code with inline-assembly & Intel syntax with gcc and implement it

I'm trying to implement c++ program which read string from c++ part of program, process it with inline assembly (convert all latin symbols to their HEX representation by number in ASCII table) and print it with c++ code. I have a problem with compiling it, I've found the way to do it without mistakes, but I can't implement it.

I've tried to compile that with:

gcc -S -masm=intel code.cpp -o code

But when I try to implement it, there are a lot of errors like that:

./main: line 1: .file: command not found
./main: line 2: .intel_syntax: command not found
./main: line 3: .text: command not found
./main: line 4: .section: command not found
./main: line 5: .type: command not found
./main: line 6: .size: command not found
./main: line 7: _ZStL19piecewise_construct:: command not found
./main: line 8: .zero: command not found
./main: line 9: .local: command not found
./main: line 10: .comm: command not found
./main: line 11: .LC0:: command not found

Here is a code of my program:

#include <iostream>
#include <fstream>
#include <clocale>
#include <curses.h>

#define MAX_LENGTH 80

using namespace std;

void printWelcomeStr();

int main()
{
    char input_string[MAX_LENGTH];
    char output_string[MAX_LENGTH];
    cin.getline(input_string, MAX_LENGTH, '\n');
    asm
    (
        ".intel_syntax;""lea eax, input_string\n""mov esi, %eax\n""lea eax, output_string\n""mov %edi, %eax\n""BEGINCYCLE:\n""lodsb\n""test al, al\n""je EXIT\n""cmp al, 41h\n" // >= 'A'"jnbe LatinLetterGeneral\n""jmp NEXT\n""LatinLetterGeneral:\n""cmp %al, 5Ah\n" // <= 'Z'"jnae LatinLetterFinal\n""cmp al, 61h\n" // >= 'a'"jnbe LatinLetterFinal\n""jmp NEXT\n""LatinLetterFinal:\n""cmp al, 7Ah\n" // > 'z'"ja NEXT\n""cmp ax, al\n""sub ax, 30h\n""push cx\n""mov cx, 2\n""rol dl, 4\n""mov ax, 300fh\n""and al,dl\n""aaa\n""aad 11h\n""pop cx\n""mov al, di\n""jmp NEXT\n""NEXT:\n""stosb\n""jmp BEGINCYCLE\n""EXIT:\n""stosb\n"
    );

    cout << "\n\nResult:"<< endl;
    ofstream file_output("output.txt");
    int i = 0;
    while (output_string[i] != '\0')
    {
        cout << output_string[i];
        file_output << output_string[i];
        i++;
    }
    cout << endl;
    file_output << endl;
    file_output.close();

    getch();
    system("pause");

    return 0;
}