sort names in array in c

Sorting Names in an Array in C

To sort names in an array in C, you can use the qsort function from the C standard library. Here are the steps to achieve this:

1. Create a Comparison Function:
2. Create a comparison function that compares two strings. The comparison function should return a negative value if the first string should appear before the second, a positive value if the first string should appear after the second, and zero if the two strings are equal.

c int compareStrings(const void a, const void b) { return strcmp((const char )a, (const char )b); }

1. Use the qsort Function:
2. Use the qsort function to sort the array of names. Pass the array, the number of elements in the array, the size of each element, and the comparison function as arguments.

c qsort(names, numNames, sizeof(char *), compareStrings);

Where names is the array of names and numNames is the number of names in the array.

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1. Complete Example:
2. Here's a complete example of sorting names in an array in C:

```c #include #include #include

int compareStrings(const void a, const void b) { return strcmp((const char )a, (const char )b); }

int main() { char *names[] = {"John", "Alice", "Bob", "Eve", "Charlie"}; int numNames = 5;

   qsort(names, numNames, sizeof(char *), compareStrings);

   for (int i = 0; i < numNames; i++) {
       printf("%s\n", names[i]);
   }

   return 0;

} ```

This example sorts the array of names in alphabetical order and then prints the sorted names.

By following these steps, you can effectively sort names in an array in C using the qsort function.