Thread: need help

// hi iam new programmer and i have a question what does nsensors mean in the function and in the if statement

Code:

#include<stdio.h>
#include<conio.h>
float avgtemp(int temperature[], int nsensors);

int main()
{
    int tempreadings[10] = { 21, 17, 23, 26, 18, 14, 11, 19, 20, 15};
    float average;
    
    average = avgtemp(tempreadings, 10);
    printf("\nthe average temperature is %.1f degrees. ",average);
    
 getch();
 
} 
float avgtemp(int dummy[], int nsensors) // what does nsensors due

{
 float average = 0;
 int j;
 for(j=0; j<nsensors; j++)
 average+= dummy[j]; // dont understant
 if(nsensors >0)           // dont understant
 average /=nsensors;
 
 return average;     
      

      
}

'nsensors' probably stands for 'number of sensors', i.e. the size of the array 'dummy'

what does nsensor ddoes

It is used to pass the size of array to a function. In this case - number of readings (10). Because when passing an array to function you actually pass a pointer to first element, separate variable for number of items required.

Code:

average+= dummy[j];

is just short form of

Code:

average = average + dummy[j];

It computes sum of element values.

Code:

if(nsensors >0)

This is just check to see if there are at least one element.