CODEWITHSUNDEEP
c++arraysbinary-search
n32303
n32303

Reputation: 829

C++ binary search with char array

so I have structure for competitors. I use binary search to search competitors by their surnames. This is the code:

int binary(tekmovalec abc[], int n, char x[20])
{
 int start = 0;
 int end = n-1;

 int a= strlen(x);

 while(start <=end)
 {

     int mid = (start+end)/2;

     if(abc[mid].surName[0]== x[0])
     { 

     print(tekmovalci[mid]);
     return mid;

     }


     else if(x[0]<abc[mid].surName[0])
     {
         end = mid -1;


     }
     else
     {start = mid +1;}

 }

return -1;

 }

I have a problem, that function checks only first letter of surname and input array, so if surname is Obrien, and user input is "Obrb" it prints Obrien. I dont know how to expand function to check for all letters of user input. Thank you.

Upvotes: 1

Views: 2302

Answers (1)

doptimusprime
doptimusprime

Reputation: 9395

Use strcmp to compare the strings in the loop.

int res = strcmp(x, abc[mid].surName);
if(!res)
 { 

 print(tekmovalci[mid]);
 return mid;

 }


 else if(res < 0)
 {
     end = mid -1;


 }
 else
 {start = mid +1;}

Upvotes: 2

Related Questions