Question

Write a function that takes an array of C-strings as a parameter and the number of elements currently stored in the array, and returns a single C-string pointer that is the concatenation of all C-strings in the array.

Note: The function must take 2 parameters and return "char *". Any other ways will cause some deduction of points.

Answer 1

char* concatenation(char* arr[], int n){
   int i, newSize = 1, j, k = 0;
   char* newArr;
   for(i = 0;i<n;i++){
      newSize += strlen(arr[i]);
   }
   newArr = (char*)malloc(sizeof(newSize));
   for(i = 0;i<n;i++){
      for(j = 0;j<strlen(arr[i]);j++){
         newArr[k++] = arr[i][j];
      }
   }
   newArr[newSize-1] = '\0';
   return newArr;
}