#include <stdio.h>
#include<assert.h>

char *mystrcpy(char *strDest,const char *strSrc)
{
    char *address= strDest;
    ASSERT ((strDest!=NULL) && (strSrc !=NULL));  
  
                  
    while(*strSrc != '\0' )
    {
        *strDest = *strSrc;
        *strSrc++;
        *strDest++;
    }
    *strDest = '\0';
    return address ;
        
}


int main(void)
{
    char a[10];
    mystrcpy(a,"123");
    printf("%s",a);
    return 0;
}

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