自己实现内存赋值函数memset 2020-10-21

#include <stdio.h>
//#include <stdlib.h>
void *my_memset(void *a, int b, size_t n)
{
    assert(a != NULL);
    char *t = (char*)a;
    while(n--)
    {
        t[n] = (char)b;
    }
    return a;
}
int main ()
{
    char str1 = {"hello"};
    printf("my memset %s\n", my_memset(str1, 'a', 3));  //aaalo
    return 0;
}
           

void bzero(void *s, size_t n)将s开始的n个字节赋值为0；