#include<stdio.h>
void copy_string(char *from, char *to);
main()
{ char a[]="I am a teacher.";
char b[]="You are a student.";
printf("string_a=%s\n string_b=%s\n",a,b);
copy_string(a,b);
printf("\nstring_a=%s\nstring_b=%s\n",a,b);
}
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