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#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstdio>
#include <string.h>

using namespace std;

char* change_of_string(char string1[])
{

    char result[300] = { "" };
    int counter = 0;
    int n;
    for (int i = 0; i < strlen(string1); i++)
    {
        counter = 0;
        char numbers[20] = { "" };
        while (isdigit((int)string1[i]))
        {
            numbers[counter] = string1[i];
            counter++;
            i++;
        }

        if (counter > 0)
        {
            i--;
            n = atoi(numbers);
            _itoa(n, numbers, 16);
            strcat(result, "0x");
            strcat(result, numbers);
        }
        else
            strncat(result, &string1[i], 1);
    }

    return result;
}

void assertion(string test, char string1[])
{
    char result[100];
    strcpy(result, change_of_string(string1));

    if (result == test)
        cout << "ok" << endl;
    else
        cout << "no" << endl;
}
int main()
{
    assertion("as0x11df0x50", "as17df80");
    assertion("0x18sdadsf0x123df", "24sdadsf291df");
    assertion("0x6ae2b7e4", "1793243108");
    assertion("asdfkjhgfuytewryfdsdffg", "asdfkjhgfuytewryfdsdffg");
    assertion("", "");
    system("pause");
    return 0;
}