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136. Binary search using recursion

#include<stdio.h>

int binary(int arr[], int n, int search, int l, int u);

int main()
{
int arr[10], i, n, search, c, l, u;

printf("Enter the size of an array : ");
scanf("%d", &n);

for (i = 0; i < n; i++)
{
printf("Enter the element %d : ", i+1);
scanf("%d", &arr[i]);
}

printf("Enter the number to be search: ");
scanf("%d", &search);

l = 0, u = n - 1;
c = binary(arr, n, search, l, u);

if (c == 0)
printf("Number not found.");
else
printf("Number found.");

return 0;
}

int binary(int arr[], int n, int search, int l, int u)
{

int mid, c = 0;

if (l <= u)
{
mid = (l + u) / 2;
if (search == arr[mid])
{
c = 1;
}
else if (search < arr[mid])
{
return binary(arr, n, search, l, mid - 1);
}
else
return binary(arr, n, search, mid + 1, u);
}
else
return c;
}
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136. Binary search using recursion

#include<stdio.h>

int binary(int arr[], int n, int search, int l, int u);

int main()
{
int arr[10], i, n, search, c, l, u;

printf("Enter the size of an array : ");
scanf("%d", &n);

for (i = 0; i < n; i++)
{
printf("Enter the element %d : ", i+1);
scanf("%d", &arr[i]);
}

printf("Enter the number to be search: ");
scanf("%d", &search);

l = 0, u = n - 1;
c = binary(arr, n, search, l, u);

if (c == 0)
printf("Number not found.");
else
printf("Number found.");

return 0;
}

int binary(int arr[], int n, int search, int l, int u)
{

int mid, c = 0;

if (l <= u)
{
mid = (l + u) / 2;
if (search == arr[mid])
{
c = 1;
}
else if (search < arr[mid])
{
return binary(arr, n, search, l, mid - 1);
}
else
return binary(arr, n, search, mid + 1, u);
}
else
return c;
}
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