where is the run-time error ?

[wumeed]

where is the run-time error in that code?

void main(){
....
char *fruites[5] = {"apple", "banana", "orange", "apricot", "pineapple"};
bubble(fruites,5,10);
}
 void bubble(char  *a[], int size, int columns)
 {
     int j,i;
     char * x= new char[columns];
     for (int z=0; z<columns;z++){
     *(x+z) ='0';

     }

         for (i = size - 1; i > 0; i--) {
                 for (j = 0; j < i; j++) {
                         if (strcmp(a[j],a[j+1]) > 0) {
                                 strcpy(x, a[j]);
                                 strcpy(a[j], a[j+1]);
                                 strcpy(a[j+1], x);
                         }
                 }
         }
 } // sorting

[Moschops]

Anything you create in your code like this - "some letters" - you cannot write over. It is a string literal and is read-only. If you copy a string literal into a char array, you can of course then write over your own char array, but you cannot write over the actual memory containing that string literal. Since you're using C++, you would find this easier if you used C++ string objects.

While I'm here, void main() is just wrong. int main() is correct.

[Ancient Dragon]

Declare it like this and it will work because the compiler copies each of the fruits into it's own 10-byte buffer that can be overwritten.

char fruites[5][10] = {"apple", "banana", "orange", "apricot", "pineapple"};