ptb2.cpp

examples C,c++ codes programs

/* GIAI PHUONG TRINH BAC HAI Ax*x+Bx+C=0 (a # 0) */
#include<stdio.h>
#include<conio.h>
#include<math.h>
float a,b,c,denta;
void main ()

{
printf(" \nGIAI PHUONG TRINH BAC HAI Ax*x+Bx+C=0 (a # 0) ");
printf("\nNhap vao cac he so A, B, C ");
 scanf(" \n%f%f%f",&a,&b,&c);

                          
denta=(b*b)-(4*a*c) ;
	if( denta >= 0)
		if( denta==0) printf("pt co nghiem kep x = %f",-b/(2*a) );
		else printf("pt co 2 nghiem x1 = %f; x2= %f", (-b-sqrt(denta))/(2*a), (-b+sqrt(denta))/(2*a) );
	else printf(" ptvn ");
printf(" \nnhap vao phim bat ki de ket thuc");
getch();
}