Question

C program question:

Write a small C program connect.c that:

1. Initializes an array id of N elements with the value of the index of the array.

2. Reads from the keyboard or the command line a set of two integer numbers (p and q) until it encounters EOF or CTL - D

3. Given the two numbers, your program should connect them by going through the array and changing all the entries with the same name as p to have the same name as q.

4. Once the EOF has been reached, your program should print the array with a max of 10 positions per line.

5. For testing purposes, define N as 10 at the beginning, but by sure of running data with at least 100 elements.

Answer 1

code in C (code to copy)

#include <stdio.h>
#include <stdlib.h>
#include <time.h>



int main(int argc, char **argv){
        //initialize N with 100
        const int N = 100;
        //declare an array with N elements
        int arr[N];
        //fill this array with value = index
        for(int i=0;i<N;i++){
                arr[i]=i;
        }
        //read pair of input from user until eof which happens when scanf returns -1
        int p,q;
        while (scanf("%d %d", &p, &q) != -1) {
        arr[p]=q;
        }

        //print the array
        for(int i=0;i<N;i++){
                //print a line break at every 10 elements
                if(i%10==0)
                        printf("\n");
                printf("%d ", arr[i]);
        }
}

code screenshot

Console Input/Output Screenshot

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