Thread: question about strcat() in C

Code:

int main()
{
   
   char* date1="Dec 29, 8:30";
   char* date2="Dec 28, 7:30";
   char* year =" 2009";
   strcat(date1,year);      
   strcat(date2,year);
   return 0;
}

After compiling and executing, the compiler gives an error

Code:

red 312 % time.out
Segmentation fault

After looking at the function strcat(), it takes 2 args of type of pointer and it is what i am passing to strcat(). I dont know i got the error. I need a explanation for it.
Thanks

strcat adds on the second string to the end first string. so you have to leave some space at the end of the first string. for example

Code:

   char date1[20]="Dec 29, 8:30";
   char date2[20]="Dec 28, 7:30";
   char* year =" 2009";
   strcat(date1,year);
   strcat(date2,year);
   printf("%s\n%s\n", date1, date2);

date1 is an array that has a bit of room left over at the end. same with date2. so you can use strcat now since there is room to add year on the end