# include <stdio.h>
#define MAXS 80
void cpy( char *s, char *t );

int main( )
{   
    char s[MAXS], t[MAXS];

    scanf("%s", t );
    cpy (s, t);
    printf("%s\n", s);
}

void cpy( char *s, char *t )
{   
    while (   )
    {
        

    }
   


}

上面空的地方应该填什么

void cpy( char *s, char *t )
{   
    while (*t)
    {
        *s=*t;
        ++t;
        ++s;
    }
    *s='\0';
}

[此贴子已经被作者于2021-3-6 15:22编辑过]

#include <stdio.h>

void cpy( char* restrict dest, const char* restrict src );

int main( void )
{
    enum { MAXS=80 };
    char s[MAXS], t[MAXS];

    scanf( "%s", t );
    cpy( s, t );
    printf( "%s\n", s );
}

void cpy( char* restrict dest, const char* restrict src )
{
    while( *dest++ = *src++ )
    {
    }
}