程序代码：

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

int main(void)
{
    char *p = (char *)malloc(sizeof(char) * 10);
    for (unsigned i = 0; i < 10; i++)
        p[i] = '6';
    printf("%s\n%u\n", p, strlen(p));
    system("pause");
    return 0;
}