document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=134103>Question 134103</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help me with a C program source code that works out the roots a quadratic equation in the form <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ax%5E2%2Bbx%2Bc=0 ALIGN=MIDDLE  ALT=\"ax%5E2%2Bbx%2Bc=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #98077 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=98077\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is C++, hope it helps:\r<BR>\n" );
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document.write( "/*<BR>\n" );
document.write( "	This is a quadratic equation solver,this program can be use to solve<BR>\n" );
document.write( "	second-order polynomial equation with one variable \"x\"\r<BR>\n" );
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document.write( "	written by: Gonzales Cenelia<BR>\n" );
document.write( "	website: www.ai-search.4t.com<BR>\n" );
document.write( "*/\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "#include <iostream><BR>\n" );
document.write( "#include <cmath>\r<BR>\n" );
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document.write( "#define sqr(x) (x)*(x)<BR>\n" );
document.write( "#define clrscr() system(\"cls\");\r<BR>\n" );
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document.write( "int main()<BR>\n" );
document.write( "{<BR>\n" );
document.write( "intro:<BR>\n" );
document.write( "	std::cout << \"\t\t\tQUADRATIC EQUATION SOLVER\n\n\";<BR>\n" );
document.write( "	std::cout << \"ENTER COEFFICIENTS:\n\";<BR>\n" );
document.write( "	float A, B, C, Delta;<BR>\n" );
document.write( "	std::cout << \"  A = \";<BR>\n" );
document.write( "	std::cin >> A;<BR>\n" );
document.write( "	std::cout << \"  B = \";<BR>\n" );
document.write( "	std::cin >> B;<BR>\n" );
document.write( "	std::cout << \"  C = \";<BR>\n" );
document.write( "	std::cin >> C;<BR>\n" );
document.write( "	std::cout << std::endl;<BR>\n" );
document.write( "	if(A == 0 && B != 0)<BR>\n" );
document.write( "	{<BR>\n" );
document.write( "		std::cout << \"THIS EQUATION IS A FIRST DEGREE EQUATION\n\";<BR>\n" );
document.write( "		std::cout << \"THE SOLUTION IS: \" << -C/B << std::endl;<BR>\n" );
document.write( "	}<BR>\n" );
document.write( "	else if(A == 0 && B == 0)<BR>\n" );
document.write( "	{<BR>\n" );
document.write( "		std::cout << \"THIS EQUATION HAS NO SOLUTION\";<BR>\n" );
document.write( "	}<BR>\n" );
document.write( "	else<BR>\n" );
document.write( "	{<BR>\n" );
document.write( "		Delta = sqr(B) - 4*A*C;<BR>\n" );
document.write( "		if(Delta < 0)<BR>\n" );
document.write( "		{<BR>\n" );
document.write( "			std::cout << \"THIS EQUATION DONT HAVE ANY REAL ROOTS\";<BR>\n" );
document.write( "		}<BR>\n" );
document.write( "		else if(Delta == 0)<BR>\n" );
document.write( "		{<BR>\n" );
document.write( "			std::cout << \"THIS EQUATION HAVE A SINGLE ROOT: \" << -B/(2*A) << std::endl;<BR>\n" );
document.write( "		}<BR>\n" );
document.write( "		else<BR>\n" );
document.write( "		{<BR>\n" );
document.write( "			std::cout << \"THIS EQUATION HAVE TWO REAL ROOTS\" << std::endl;<BR>\n" );
document.write( "			<BR>\n" );
document.write( "			float X1 = (-B + sqrt(Delta)) / (2 * A);<BR>\n" );
document.write( "			float X2 = (-B - sqrt(Delta)) / (2 * A);\r<BR>\n" );
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document.write( "			std::cout << \"  X1 = \" << X1 << std::endl;<BR>\n" );
document.write( "			std::cout << \"  X2 = \" << X2 << std::endl;<BR>\n" );
document.write( "		}<BR>\n" );
document.write( "	}\r<BR>\n" );
document.write( "\n" );
document.write( "	std::cout << \"\nDO YOU WANT TO SOLVE ANOTHER EQUATION?\nYes(y) No(n): \";<BR>\n" );
document.write( "	fflush(stdin); // flush input buffer<BR>\n" );
document.write( "	int sel = tolower(getchar());<BR>\n" );
document.write( "	while(sel != 'y' && sel != 'n')<BR>\n" );
document.write( "	{<BR>\n" );
document.write( "		std::cout << \"\nWRONG SELECTION,PLEASE CHOOSE \\"y\\" FOR \\"YES\\" OR \\"n\\" FOR \\"NO\\": \" << std::endl;<BR>\n" );
document.write( "		fflush(stdin); // flush input buffer<BR>\n" );
document.write( "		sel = tolower(getchar());<BR>\n" );
document.write( "	}\r<BR>\n" );
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document.write( "	if(sel == 'y')<BR>\n" );
document.write( "	{<BR>\n" );
document.write( "		clrscr();<BR>\n" );
document.write( "		goto intro;<BR>\n" );
document.write( "	}\r<BR>\n" );
document.write( "\n" );
document.write( "	std::cout << \"\nTHANKS FOR USING THIS PROGRAM!\" << std::endl;<BR>\n" );
document.write( "	return 0;<BR>\n" );
document.write( "} </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );