void chchar(char* ch){
  ch = "asfafgag";
}

char* array = "abc";
chchar(array);
cout << array;

#include <iostream>
#include <cstring>
#include <stdlib.h>
using namespace std;

void chchar(char** str)
{
    strcpy(*str, "String data from `chchar`");
}

int main(int argc, char** argv)
{
    char* data = static_cast<char*>(malloc(sizeof(100)));
    strcpy(data, "Blablbla");
    printf("Data before call `chchar`: %sn", data);
    chchar(&data);
    printf("Data before call `chchar`: %sn", data);
    free(data);
    system("pause");
}

#include <iostream>
#include <cstring>
#include <stdlib.h>
using namespace std;

void chchar(char*& str)
{
    strcpy(str, "String data from `chchar`");
}

int main(int argc, char** argv)
{
    char* data = static_cast<char*>(malloc(sizeof(100)));
    strcpy(data, "Blablbla");
    printf("Data before call `chchar`: %sn", data);
    chchar(data);
    printf("Data before call `chchar`: %sn", data);
    free(data);
    system("pause");
}