Im codding a programm that has multiple functions.

Once functions calculates the means of 2 sets of data and prints meanx and meany.

Now another function will use those means to do some other calculation.

I dont know how to get those values from one function and pass them into another?
Can anyone help me here??

Thank you

ok, here is example code

void print(int x, int y)
{
    cout << x << " " << y << "\n";
}

void calculate( int* meanx, int* meany)
// The two parameters are pointers to the integers that
// are declared in main()
{
    *meanx = 1;
    *meany = 2;
}

int main()
{
    int meanx = 0; 
    int meany = 0;
    calculate(&meanx, &meany);
    print(meanx, meany);
}

ok, here is example code

void print(int x, int y)
{
    cout << x << " " << y << "\n";
}

void calculate( int* meanx, int* meany)
// The two parameters are pointers to the integers that
// are declared in main()
{
    *meanx = 1;
    *meany = 2;
}

int main()
{
    int meanx = 0; 
    int meany = 0;
    calculate(&meanx, &meany);
    print(meanx, meany);
}

Can u show me in this code, I still didnt quet grasp it.

#include <stdio.h>
#include <string.h>
#include<stdlib.h>

typedef struct
{
unsigned int larray;
double *x;
double *y;
}data;

double getArrayBar( double *array , int length ) ;

data getdata(const char file[]);
double corr(data data_sm);



int main(void)
{
data data_sm;

char filename[20];

printf("\nEnter the file name  : ");
scanf("%s",&filename);

data_sm = getdata(filename);


corr(data_sm);

return 0;
}

double getArrayBar( double *array , int length )
{
	double sum = 0 ;
	for ( int i = 0 ; i < length ; i++ )
		sum += array[i] ;
		
	return sum/length ;
}

data getdata(const char file[])
{
	data d;
	int i=0,j=0;
	FILE *inputFile;
	double meanx, meany;
	/*double a[200],b[200];*/
	d.x = 0;
	d.y = 0;
	inputFile = fopen(file,"r");
		
			if(inputFile == NULL)
			{	
			printf ("Error opening data file \n");
			exit(1);	
			}

			do
			{
			
			d.x = realloc(d.x, (i+1)*sizeof(double));
			d.y = realloc(d.y, (i+1)*sizeof(double));
			i++;
			
			if(!d.y || !d.x) {
    			printf("Allocation Error\n");
    			exit(1);}
			}
			while(fscanf(inputFile,"%lf %lf",&d.x[i-1],&d.y[i-1]) == 2);
			
	meanx = getArrayBar (d.x , i -1 );
	meany = getArrayBar (d.y , i -1 );
	
	printf("X bar is %lf\n", meanx) ;
	printf("Y bar is %lf\n", meany) ;
	   
   	fclose(inputFile);	  
	free (d.x);
	free (d.y);
	return d;	 
}
/* Calculates the linear correlation coeffcient */
double corr(data data_sm)
{




}

As you can see one function reads a file and calculates the means of x and y, now in function double corr i want to be able to use meanx and meany.

double corr(data data_sm, double meanx, double meany);

data getdata(const char file[], double* meanx, double* meany)
{
<snip>
	*meanx = getArrayBar (d.x , i -1 );
	*meany = getArrayBar (d.y , i -1 );

}

int main()
{
    double meanx = 0, meany = 0;
   <snip>
   data_sm = getdata(filename, &meanx, &meany);
    corr(data_sm, meanx, meany);
}
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