Question

自定义c语言字符串拷贝函数strcpy

Answer 1

/*
原 串 : Windows Application
目标串 : Windows Application
请按任意键继续. . .
*/
#include <stdio.h>
#include <stdlib.h>
char *strcopy(char ds[], char ss[]) {
int i = 0;
while(ds[i] = ss[i]) ++i;
return ds;
}

int main() {
char s[] = "Windows Application";
char d[20];
printf("原 串 : %s\n",s);
printf("目标串 : %s\n",strcopy(d,s));
system("pause");
return 0;
}

Answer 2

#include <stdio.h>
char* cpystr(char *des, char *res)
{
for(int i= 0; res[i]!='\0'; i++)
des[i]= res[i];
des[i]= '\0';
return des;
}
int main (void)
{
char d[30], s[]= "12345";
cpystr(d, s);
puts(d);
return 0 ;
}

Answer 3

char* mystrcpy(char* dest, const char* src) {
char* tmp = dest;
while (*tmp++ = *src++)
;

return dest;
}