Call of nonfunction & Misplace else

[jpiks21]

Need help here..Sorry still new in programming

I have an assignment which is quadratic formula and using if and else but i have some errors but i don't know what to do.... here's the program

#include <stdio.h>
#include <conio.h>
#include <math.h>
 
float a,b,c,determinant,x_1,x_2;
 
void main()
    {
    clrscr();
    printf("\nEnter the value of a:",a);
    scanf("%d",&a);
    printf("\nEnter the value if b:",b);
    scanf("%d",&b);
    printf("\nEnter the value of c:",c);
    scanf("%d",&c);
    determinant=sqrt((b*b)(4*a*c));
 
    if (determinant >=0);
    {
    x_1=((-b)+sqrt(determinant))/(2*a);
    x_2=((-b)-sqrt(determinant))/(2*a);
    printf("\n\nx_1 = %.02f",x_1);
    printf("\n\nx_2 = %.02f",x_2);
    }
 
    else
    {
    printf("\nThe input is invalid!\n");
    }
 
    getch();
 
    }
 

Error NONAME00.CPP 16: Call of nonfunction
Error NONAME00.CPP 26: Misplace else

Need help please...

[weaknessforcats]

This code:

if (determinant >=0); <--- remove semi-colon
 {
 x_1=((-b)+sqrt(determinant))/(2*a);
 x_2=((-b)-sqrt(determinant))/(2*a);

has a semi-colon in the if which terminates the the if. Your sqrt calls are missing a pair of of parentheses. You must use
sqrt(determinant/(2*a)).

Lastly, floats are not meant to be used with the equality operator like == or >= or <=. The reason is that floats are rounded so that something close to equal might be tested as equal. For beginners I wouls use an int for the determinant or I would research how to compare floating point numbers.

[donbock]

Another issue is that your variables are "float", but you ask scanf to store integers (%d) in them. That won't do what you want.