Comp Sci Searching Array for an Element using Linear Search

[iquicck]

Homework Statement

I write a Linear Search code but ı redesign for ask to user version

Relevant Equations

Linear Search

I write a Linear Search code,then ı decided ask to user "r" and "int arr".I mean,User decide their r and arr numbers.I tried scanf("%d",r); command but doesn't work
This code my first code before the decide Ask user :

#include <stdio.h>

int search(int arr[], int n, int r)
{
    int i;
    for (i = 0; i < n; i++)
        if (arr[ i] == r)
            return i;
    return -1;
}int main(void)
{
    int arr[] = { 7, 9, 12, 28, 17,32 };
    int r = 17;
    int n = sizeof(arr) / sizeof(arr[0]);
 
  
    int result = search(arr, n, r);
    (result == -1)
        ? printf("Element is not present in array")
        : printf("Element is present at index %d", result);
    return 0;
}

 

[mfb]

I fixed a formatting issue with the code. The forum interprets [i] as command to display following text in italics. To avoid that you can put code in [code] tags or write [plain][i][/plain].

I tried scanf("%d",r); command but doesn't work

What exactly does not work?

This code my first code before the decide Ask user :

The code that causes problems would be more useful to find the problem.

 

[iquicck]

I fixed a formatting issue with the code. The forum interprets [i] as command to display following text in italics. To avoid that you can put code in [code] tags or write [plain][i][/plain].What exactly does not work?The code that causes problems would be more useful to find the problem.

Code is work but I want to redesign my code for ask to user for enter number to "r"
I wrote;
printf("Enter r number);
scanf("%d",r);
but it didnt work

 

[Mark44]

Code is work but I want to redesign my code for ask to user for enter number to "r"
I wrote;
printf("Enter r number);
scanf("%d",r);
but it didnt work

The prompt is not very useful. Instead of printing "Enter r number" it would be better to say "Enter the number to search for".

The scanf function requires the address of the variable you're going to input to.

Try this:

scanf("%d", &r);

 

[Mark44]

I fixed a formatting issue with the code. The forum interprets as command to display following text in italics. To avoid that you can put code in

 tags or write [plain][i][/plain].

I surrounded the code in post #1 with code tags. I also changed one line in the search function to arr[ i], with a space preceding the index i. This keeps the browser from displaying what follows as italics.