Можно ли вручную вызвать метод main()

#include <iostream>
#include <ctime>
#include <cstdlib>
 
bool checknum(int, char *);
bool checkwin(char *, char *);
int checkrightpos(char *, char *, int);
int checkrightdig(char *, char *, int);
bool checkinvalidinput(char *, int);
void setpause(float i);
 
bool first = true;
 
int main()
{
    std::srand(time(NULL));
    const int numsize = 5;
    char *number, *answer, *testanswer;
    int *rightdig, *rightpos, *attempts;
    number = new char[numsize];
    attempts = new int;
    for(int i = 0; i < numsize; i++){
        do
            number[i] = std::rand() % 10 + 48;
        while(i != 0 && checknum(i, number));
    }
    number[numsize - 1] = '\0';
    if(first)
        std::cout << "Hello, welcome to the Logic Game!\n";
    first = false;
    std::cout << "Number has generated.\nYou have 10 attempts, start!" << std::endl;
    std::cout << "Enter the number: ";
    rightdig = new int;
    rightpos = new int;
    answer = new char[numsize];
    testanswer = new char[100];
    *attempts = 10;
    while(std::cin.getline(testanswer,100)){
        for(int i = 0; i < numsize - 1; i++)
            answer[i] = testanswer[i];
        answer[numsize - 1] = '\0';
        if(checkinvalidinput(answer, numsize - 1)){
            std::cout << "Invalid input! Enter again: ";
            continue;
        }
        if(*attempts == 1)
            break;
        else
            (*attempts)--;
        if(checkwin(answer, number))
            break;
        *rightdig = checkrightdig(answer, number, numsize - 1);
        *rightpos = checkrightpos(answer, number, numsize - 1);
        std::cout << "You number is\t   " << answer <<". ";
        std::cout << *rightdig << " right numbers," << *rightpos << " in right position.\n";
        std::cout << *attempts << " attempts.\n";
        std::cout << "Enter again: ";
        continue;
    }
    if(*attempts == 1)
        std::cout << "You Lose! Right number is " << number << "!\n";
    else
        std::cout << "You won for " << 10 - *attempts << " attempts!" << std::endl;
    std::cout << "Wanna play again?(y/n): ";
    delete [] number;
    delete rightdig;
    delete rightpos;
    delete [] answer;
    delete [] testanswer;
    delete attempts;
    answer = new char[100];
    while(std::cin.getline(answer,100) && answer[0] != 'n' && answer[0] != 'N'){
        switch (answer[0]){
        case 'Y':
        case 'y':
            main();. dspdfn
        default:
            std::cout << "Incorrect input, enter again: ";
            continue;
        }
    }
    delete [] answer;
    std::cout << "Okay, bye!";
    setpause(1);
    return 0;
}
 
bool checknum(int j, char *num){
    bool outbool = false;
    for(int i = j - 1; i >= 0; i--){
        if(num[i] == num[j]){
            outbool = true;
            break;
        }
    }
    return outbool;
}
 
bool checkwin(char *answer, char *right){
    bool outbool = true;
    for(int i = 0; answer[i] != '\0'; i++){
        if(answer[i] != right[i])
            outbool = false;
    }
    return outbool;
}
 
bool checkinvalidinput(char *input, int inputsize){
    bool outbool = false;
    if(sizeof(input) > inputsize)
        outbool = true;
    else
        for(int i = 0; i < inputsize; i++)
            if(!isdigit(input[i])){
                outbool = true;
                break;
            }
    for(int i = 1; i < inputsize; i++){
        for(int j = i - 1; j < i; j++)
            if(input[j] == input[i]){
                outbool = true;
                break;
            }
        if(outbool)
            break;
    }
    return outbool;
}
 
int checkrightdig(char *answer, char *right, int numsize){
    int rightnums = 0;
    for(int i = numsize - 1; i >= 0; i--)
        for(int j = numsize - 1; j >= 0; j--)
            if(answer[i] == right[j]){
                rightnums++;
                break;
            }
    return rightnums;
}
 
int checkrightpos(char *answer, char *right, int numsize){
    int rightnums = 0;
    for(int i = 0; i < numsize; i++)
        if(answer[i] == right[i])
            rightnums++;
    return rightnums;
}
 
void setpause(float i){
clock_t sec = i * CLOCKS_PER_SEC;
clock_t secpause = clock();
while(clock() - secpause < sec);
}