Question

Write a Program in C language for:

1. Create a C program to read 7 integers and store them in an array. Next, the program is to check if the array is symmetric, that is if the first element is equal to the last one, the value of the second one is equal to the value of the last but one, and so on. Since the middle element is not compared with another element, this would not affect the symmetry of the array. Make your program work for odd number of elements and for even number of elements in the array 2. Write C program that reads 30 integers and stores them in two arrays of 15 elements each. The program is to check if the two arrays have common elements, and if yes, the program is to display the value of each common element and its position in both arrays. Otherwise, the C program is to display a message that their elements are different.

Answer 1

As per Chegg policy we are supposed to answer only first question. Request you to post other question separately.
#include <stdio.h>
int main(){
int num[30]; //maximum 30 numbers can be stored
int i, j;
int count;
int symmetric = 1; //assume to be symmetric
printf("How many numbers to be in array? ");
scanf("%d", &count);
printf("Enter the numbers: ");
for(i = 0; i < count; i++)
scanf("%d", &num[i]);
i = 0;
j = count - 1; //last array element
while(i < j){
if(num[i] != num[j])
{
symmetric = 0;
break;
}
i++;
j--;
}
if(symmetric)
printf("The array is symmetric\n");
else
printf("The array is not symmetric\n");
}
output
------
How many numbers to be in array? 7
Enter the numbers: 1 2 3 4 3 2 1
The array is symmetric

How many numbers to be in array? 6
Enter the numbers: 1 2 3 3 2 1
The array is symmetric
How many numbers to be in array? 7
Enter the numbers: 1 2 3 4 5 6 7
The array is not symmetric