C Exercises: Find majority element of an array
C Array: Exercise-49 with Solution
Write a program in C to find the majority element of an array.
Pictorial Presentation:

Sample Solution:
C Code:
# include <stdio.h>
void findMajorityElement(int *arr1, int arr_size)
{
int i, mIndex = 0, ctr = 1;
for(i = 1; i < arr_size; i++)
{
if(arr1[mIndex] == arr1[i])
ctr++;
else
ctr--;
if(ctr == 0)
{
mIndex = i;
ctr = 1;
}
}
ctr = 0;
for (i = 0; i < arr_size; i++)
{
if(arr1[i] == arr1[mIndex])
ctr++;
}
if(ctr > (arr_size/2))
printf("The majority of the Element : %d\n", arr1[mIndex]);
else
printf("No majority element found in the array.\n");
}
int main()
{
int i, sum;
int arr1[] ={1, 3, 3, 7, 4, 3, 2, 3, 3};
int ctr = sizeof(arr1)/sizeof(arr1[0]);
//------------- print original array ------------------
printf("The given array is : ");
for(i = 0; i < ctr; i++)
{
printf("%d ", arr1[i]);
}
printf("\n");
//------------------------------------------------------
findMajorityElement(arr1, ctr);
return 0;
}
Sample Output:
The given array is : 1 3 3 7 4 3 2 3 3 The majority of the Element : 3
Flowchart:

C Programming Code Editor:
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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);
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