#Demo #include <stdio.h>

int main() { int c, first, last, middle, n, search, array[100];

printf("Enter number of elements\n"); scanf("%d",&n);

printf("Enter %d integers\n", n);

for (c = 0; c < n; c++) scanf("%d",&array[c]);

printf("Enter value to find\n"); scanf("%d", &search);

first = 0; last = n - 1; middle = (first+last)/2;

while (first <= last) { if (array[middle] < search) first = middle + 1;
else if (array[middle] == search) { printf("%d found at location %d.\n", search, middle+1); break; } else last = middle - 1;

  middle = (first + last)/2;

} if (first > last) printf("Not found! %d isn't present in the list.\n", search);

return 0;
}