Each of the following code snippets contains a significant memory error. Identify the error and explain how it can be fixed. (Ignore possible syntax errors.)

(a) int main(int argc, char *argv[]){

char *arg1copy;

if (argc!=2) exit(1);

strcpy(arg1copy, argv[1]);

}

(b)

#define MAXLEN 15

char *toUp(char *before){

char buf[MAXLEN]; int i;

if (strlen(before)>=MAXLEN)exit(1);

for (i=0;before[i] != '\0';i++)

{

if ((before[i] <=97) && (before[i]<=122)) buf[i]=before[i]-32;

else buf[i]=before[i]-32;

}

return(&buf[0]);

}