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linearandbinarysearch.cpp
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155 lines (83 loc) · 2.36 KB
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#include <stdio.h>
#include <stdlib.h>
int main()
{
/* Declare variables - array_of_number,search_key,i,j,low,high*/
int array[100],search_key,i,j,n,low,high,location,choice;
void linear_search(int search_key,int array[100],int n);
void binary_search(int search_key,int array[100],int n);
/* read the elements of array */
printf("ENTER THE SIZE OF THE ARRAY:");
scanf("%d",&n);
printf("ENTER THE ELEMENTS OF THE ARRAY:\n");
for(i=1;i<=n;i++)
{
scanf("%d",&array[i]);
}
/* Get the Search Key element for Linear Search */
printf("ENTER THE SEARCH KEY:");
scanf("%d",&search_key);
/* Choice of Search Algorithm */
printf("___________________\n");
printf("1.LINEAR SEARCH\n");
printf("2.BINARY SEARCH\n");
printf("___________________\n");
printf("ENTER YOUR CHOICE:");
scanf("%d",&choice);
switch(choice)
{
case 1:
linear_search(search_key,array,n);
break;
case 2:
binary_search(search_key,array,n);
break;
default:
exit(0);
}
return 0;
}
/* LINEAR SEARCH */
void linear_search(int search_key,int array[100],int n)
{
/*Declare Variable */
int i,location;
for(i=1;i<=n;i++)
{
if(search_key == array[i])
{
location = i;
printf("______________________________________\n");
printf("The location of Search Key = %d is %d\n",search_key,location);
printf("______________________________________\n");
}
}
}
/* Binary Search to find Search Key */
void binary_search(int search_key,int array[100],int n)
{
int mid,i,low,high;
low = 1;
high = n;
mid = (low + high)/2;
i=1;
while(search_key != array[mid])
{
if(search_key <= array[mid])
{
low = 1;
high = mid+1;
mid = (low+high)/2;
}
else
{
low = mid+1;
high = n;
mid = (low+high)/2;
}
}
printf("__________________________________\n");
printf("location=%d\t",mid);
printf("Search_Key=%d Found!\n",search_key);
printf("__________________________________\n");
}