Write a C program that takes an array of integers as input and finds the second largest number in the array. The program should prompt the user to enter the size of the array and then the elements of the array. Assume that the array size is always greater than or equal to 2.
Example:
Input:
Enter the size of the array: 5
Enter the elements of the array: 10 20 30 40 50
Output:
The second largest number is 40
Note: In the above example, the second largest number in the array [10, 20, 30, 40, 50] is 40.
#include
int main() {
int size, i;
printf("Enter the size of the array: ");
scanf("%d", &size);
int arr[size];
printf("Enter the elements of the array: ");
for (i = 0; i < size; i++) {
scanf("%d", &arr[i]);
}
int max = arr[0];
int secondMax = arr[1];
if (secondMax > max) {
int temp = max;
max = secondMax;
secondMax = temp;
}
for (i = 2; i < size; i++) {
if (arr[i] > max) {
secondMax = max;
max = arr[i];
} else if (arr[i] > secondMax && arr[i] != max) {
secondMax = arr[i];
}
}
printf("The second largest number is %d\n", secondMax);
return 0;
}
Explanation:
The program prompts the user to enter the size of the array and reads it using scanf.
An array arr of size size is declared.
The program then prompts the user to enter the elements of the array and reads them using a loop.
Two variables max and secondMax are initialized with the first two elements of the array.
If secondMax is greater than max, their values are swapped.
A loop is used to iterate through the remaining elements of the array.
If an element is greater than max, secondMax is updated to max and max is updated to the current element.
If an element is greater than secondMax but not equal to max, secondMax is updated to the current element.
Finally, the program prints the value of secondMax.
I hope this helps! Let me know if you have any further questions.
Sflow
