Thread: Problem with calling the function

Code:

#include <stdio.h>
#include <math.h>
int sum();
double arcLength();
double greatest(double t, double u, double v);
int main() {
	int result1, result2;
	double s;
	double highestnum;
	result1 = Sum();
	result2 = Sum();
	s = arcLength();
	highestnum = greatest(double t, double u, double v); // < keeps underlining double. 
	printf("The highest number is %lf", highestnum);
	printf("First sum = %d, Second sum = %d\n", result1, result2);
	printf("Arclength = %lf meters", s);


}
int sum() {
	int a, b, c;
	printf("Enter a value for a: ");
	scanf("%d", &a);
	printf("Enter a value for b: ");
	scanf("%d", &b);
	printf("Enter a value for c: ");
	scanf("%d", &c);
	//printf("The sum of a, b, and c is: %d\n", a + b + c);
	return a + b + c;
}
double arcLength() {
	double r, AngleR, AngleD;
	int choice;
	printf("Input radius in meters for circle: ");
	scanf("%lf", &r);
	printf("Do you have an angle value in radians? (0 for yes or 1 for no): ");
	scanf("%d", &choice);
	if (choice > 0) {
		printf("Enter an angle in degrees: ");
		scanf("%lf", &AngleD);
		printf("Your angle in radians is %lf\n", AngleD*0.017444);
		printf("Input an angle in radians: ");
		scanf("%lf", &AngleR);
	}
	else if (choice < 1) {
		printf("Input an angle in radians: ");
		scanf("%lf", &AngleR);
	}
	return r * AngleR;
}
double greatest(double t, double u, double v) {
	printf("Enter 3 values: ");
	scanf("%lf %lf %lf", &t, &u, &v);
	if (t > u)
		if (t > v)
			return t;
		else
			return v;
	else
		if (u > v)
			if (u > t)
				return u;
			else 
				return v;
}

When I remove the double it just underlines the t u and v

Originally Posted by Salem

> highestnum = greatest(double t, double u, double v); // < keeps underlining double.
You don't include the types when you're calling a function.

Look at your usage of printf on the next line, do you see types there?

Hi,

Consider this code :

Code:

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

double greater(double a, double b);
double greatest(double a, double b, double c);

int main(void)
{
    double t;
    t = greatest(1.0,2.0,3.0);

    printf("%f\n",t);
    return EXIT_SUCCESS;
}

double greater(double a, double b)
{
    double r;
    if (a>b)
        r=a;
    else 
        r=b;
    
    return r;
}

double greatest(double a, double b, double c)
{
    double r;
    double ab = greater(a,b);
    
    r = greater(ab,c);
    
    return r;
}