How to display the index of the largest value of array in C?

Question

The user has to input 10 values and that you should display the largest value and its index. I already got the largest value using for loop..

largest = num[0];
for (n = 1; n < 10; n++) {
    if (largest < num[n])
        largest = num[n];
}

but I don't know how to get its index. I've tried googling it but they are in java (PS I'm only a beginner)

Answer 1

Instead of storing the largest value, just store the index:

size_t index_of_max = 0;
for(size_t n = 1; n < 10; n++) {
  if(numbers[index_of_max] < numbers[n]) {
    index_of_max = n;
  }
}

Also, just a small stylistic note: always use braces for if s, even if they're one statement. It's good practice that can avoid bugs (and not doing it has been the cause of a lot of security problems).

Answer 2

Always index starts from 0. try this i hope this may help you out.

var max = arr[0];
var maxIndex = 0;

for (var i = 1; i < arr.length; i++) {
if (arr[i] > max) {
    maxIndex = i;
    max = arr[i];
   }
}