s
and t
are both string literals, and you can't modify a string literal. But this piece of code
*s++ = *t++
will modify s
, which causes segmentation fault.
To fix it, use a char
array. I also modified the printf
part to make it legal.
#include<stdio.h>
int main()
{
char arr[] = "Goal";
char *s = arr;
char *t = "Home";
while(*s++ = *t++)
;
printf("%s\n", arr);
return 0;
}
However, I think this program is better done using an individual function to copy the string, the program will look clearer.
#include<stdio.h>
void my_strcpy(char *s, char *t);
int main()
{
char s[] = "Goal";
char *t = "Home";
my_strcpy(s, t);
printf("%s\n", s);
return 0;
}
void my_strcpy(char *s, char *t)
{
while(*s++ = *t++)
;
}