Why does strcat() stop the program?

Question

C++ / C#

C program stops execution at strcat() function

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
    int x = -1, z = 1;
    char string[10] = { '\0' };


    while (x != 0)
    {
        printf("Vvedit chislo = ");
        scanf_s("%d", &x);
        z = x * z;
        strcat(string, z);
    }

    printf("%s\n", string);

    
    _getch();
    return 0;
}

Answer 1

Because you need to pass a pointer to a string to strcat, you pass the variable z as an int. As a result, z is interpreted as the address at which the string lies and a segmentation error occurs.

Answer 2

The prototype of the strcat() function: does it suggest anything? :)
char *strcat(char *dest, const char *src);