C language learning DAY3 a quadratic equation preliminary version

#include <stdio.h>
#include <the cmath>

int main (void)
{
    int = panduan. 1;
    int = A. 1;
    int B = 2;
    int. 3 = C;
    a float Delta = 10;
    a float X1;
    a float X2;
the while (== panduan. 1)
{
    the printf ( "enter a quadratic equation aX2 + bX + c = 0 the coefficient \ n-.");
    the printf ( "Please enter a value of the coefficient a: \ n-");
    Scanf ( "% ; D ", & a)
    \ n-");: enter the value of the coefficient b of the printf ( "
    Scanf ("% D ", & b);
    the printf (" Please enter the coefficient value of c: \ n-");
    Scanf ("% D ", & C);
    the printf (" a quadratic equation you entered is:% dX2 +% dX +% D = 0 \ n-", a, B, C);
    
    Delta = B * B -. 4 * a * C;

    
    IF (delta>0)
    {
        x1 = (-b + sqrt(delta)) / 2*a;
        = X2 (-b - sqrt (Delta)) / 2 * A;
        the printf ( "Enter your quadratic solution monohydric is: \ n-");
        the printf ( "% X1 = F \ n-", X1);
        the printf ( "F X2 =% \ n-", X2);
        the printf ( "Solution end \ n-");
    }
    
    IF (== 0 Delta)
    {
    X1 = -b / 2 * A;
    X2 = -b / 2 * A;    
    printf ( "enter your quadratic solution monohydric is: \ n-");
    printf ( "X1 = X2 = F% \ n-", X1);
    printf ( "solution end \ n-");
    }

    IF (Delta < 0)
    {
    printf ( "You entered one yuan quadratic equation has no solution \ the n-.");
    printf ( "solving the end of \ the n-.");
    }
    printf ( "Please continue to do your will continue after 1 enter input? Please enter enter exit 0, \ n-");
    Scanf ("% D ", & panduan);
}

    return 0;

}