Question

How to check if a sequence of numbers is a Geometric progression (consecutive ratios are the same) in C

Answer 1

#include <stdio.h>

int isGeometricProgression(int arr[], int size) {
    if (size == 1) {
        return 0;
    }
 
    int ratio = arr[1] / (arr[0]);

    for (int i = 1; i < size; i++) {
        if ((arr[i] / (arr[i - 1])) != ratio) {
            return 0;
        }
    }
    
    return 1;
}
 
int main()
{
    int arr[] = {9, 27, 81, 243, 729, 2187 };
    int size = sizeof(arr) / sizeof(arr[0]);
 
    (isGeometricProgression(arr, size)) ? (printf("Yes\n")) : (printf("No\n"));

    return 0;
}


/*
run:

Yes

*/

 

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