Question

用字符指针定义函数strmcpy（s,t,m)，将字符串t中从m个字符开始的全部字符复制到字符串s中去？？

Answer 1

#include <stdio.h>

void strmcpy(char *s,char *t,int m)
{
for(t+=m-1;*t;*s++=*t++);
*s='\0';
}

void main()
{
char s[20],t[20]="1234567890";

strmcpy(s,t,5);
printf("%s",s);
}

Answer 2

char *strmcpy(char *dest, const char *src, size_t count)
{
char *tmp = dest;

while (count) {
if ((*tmp = *src) != 0)
src++;
tmp++;
count--;
}
return dest;
}