So I am trying to run this code where I calculate the mean and median in 2 function. When I use these function my main function and run my program sometimes it gives me the right answer and sometimes it gives me some random numbers for the mean eventhough i run the exact same code. Can somebody explain this behavior to me? Any Help is appreciated.

float mean(int *numbers, int n){
    int i=0;
    float solution;
    float tmp_m;

    for(i=0; i<n; i  ){
        tmp_m=(float)numbers[i] tmp_m;
    }
        
    solution=tmp_m/((float)n);

    return solution;
}

float median(int *numbers, int n){
    float median;
    float median_b;
    int index;
    int index_b;

    if(n % 2 == 1){
        index=n/2;
        median= (float)numbers[index];
        return median;

    }else if (n % 2 == 0){
        index_b=n/2;
        float tmp_median;
        tmp_median= (float)numbers[index_b]   (float)numbers[index_b-1];
        median_b=tmp_median/((float)2);
        return median_b;

    }
}

#include <stdio.h>

int main () {
    int array[6]={0,2,3,4,0,5};
    int n=6;
    
    float result=mean(array, n);
    float result_median=median(array, n);

    printf("%f\n%f\n", result, result_median);

    return 0;
}

CodePudding user response：

The variable tmp_m is left uninitialized and it gives you random values. So, replace float tmp_m; with float tmp_m = 0; in the mean function.

CodePudding user response：

You haven’t initialised tmp_m to zero before using it.