Here is a C function which implements the strcat() function...
/* Function to concatenate string t to end of s; return s */
char *myStrcat(char *s, const char *t)
{
char *p = s;
if (s == NULL || t == NULL)
return s; /* we need not have to do anything */
while (*s)
s++;
while (*s++ = *t++)
;
return p;
}
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17 comments:
this will cause access violation
since you don't know what's after s++ it might be something else on the stack
for example ,when char *s is "1920219",inside of the string, there is a "0". when you use while(*s),the loop will interrupt. So I cannot sure the program will work well.
if we write
while(*s!='/0')
instead of
while(*s)
tada..problem solved!!
No. Zero has a value of 48 since it is ASCII. The loop will not break unless it specifically a '/0' which is 0 in ASCII.
it is not working
it is not working
char* myStrcat(char *s, const char *t)
{
char *p = s;
if (s == NULL || t == NULL)
return s; /* we need not have to do anything */
while ((*s) != '\0')
{
s++;
}
while ((*t) != '\0')
{
*s++ = *t++;
}
*s = '\0';
return p;
}
Make sure parameter 's' has enough space to hold both strings.
For example:
char dest[100] = "test ";
char src[] = "this out";
myStrcat(dest, src);
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