Problem with calling the function

Code:

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#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;
}

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> 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?

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

Quote:

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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?

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Hi,

Consider this code :

Code:

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#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;
}

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