C Exercises: Find the missing number from a given array
C Array: Exercise-36 with Solution
Write a program in C to find the missing number in a given array. There are no duplicates in the list.
Pictorial Presentation:

Sample Solution:
C Code:
#include <stdio.h>
int pickMissNumber(int *arr1, int ar_size)
{
int i, sum = 0, n = ar_size + 1;
for(i = 0; i < ar_size; i++)
{
sum = sum + arr1[i];
}
return (n*(n+1))/2 - sum;
}
int main()
{
int i;
int arr1[] = {1, 3, 4, 2, 5, 6, 9, 8};
int ctr = sizeof(arr1)/sizeof(arr1[0]);
printf("The given array is : ");
for(i = 0; i < ctr; i++)
{
printf("%d ", arr1[i]);
}
printf("\n");
printf("The missing number is : %d \n", pickMissNumber(arr1, ctr));
return 0;
}
Sample Output:
The given array is : 1 3 4 2 5 6 9 8 The missing number is : 7
Flowchart :

C Programming Code Editor:
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Next: Write a program in C to find the pivot element of a sorted and rotated array using binary search
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C Programming: Tips of the Day
C Programming - What is the argument for printf that formats a long?
Put an l (lowercased letter L) directly before the specifier.
unsigned long n; long m; printf("%lu %ld", n, m);
Ref : https://bit.ly/3dIwfkP
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