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help on something
I can't for the life of me figure out how to fix this, please assist.
Code:
#include <stdio.h>
#include <math.h>
#include "genlib.h"
main()
{
int inputs[3], a, b, c, d, x, x1, x2, i, lastDigit;
char *os, *noSol = "No solution\n", *cont = 'y';
while (cont == 'Y' || cont == 'y')
{
printf("This program solves a quadratic equation\n");
for (i = 1; i <= 3; i++)
{
lastDigit = i % 10;
if (i >= 4 && i <= 20)
os = "th";
if (i == 1 || lastDigit == 1)
os = "st";
else if (i == 2 || lastDigit == 2)
os = "nd";
else if (i == 3 || lastDigit == 3)
os = "rd";
else
os = "th";
printf("Enter your %d%s number: ", i, os);
scanf("%d", &inputs[i - 1]);
}
a = inputs[0];
b = inputs[1];
c = inputs[2];
while (1)
{
if (a == 0)
{
if (b == 0)
{
printf(noSol);
break;
}
else
{
x = -c / b;
printf("The equation is not quadratic and the solution is %d\n", x);
break;
}
}
else
{
d = pow(b, 2) - 4 * a * c;
if (d < 0)
{
printf(noSol);
break;
}
else if (d == 0)
{
x1 = -b / 2 * a;
printf("One solution: %d\n", x1);
break;
}
else
{
x1 = (-b + sqrt(d)) / 2 * a;
x2 = (-b - sqrt(d)) / 2 * a;
printf("Two solutions: %d and %d\n", x1, x2);
break;
}
}
}
printf("Would you like to run the program again? ( Y / N )\n");
scanf("%s", &cont);
}
system("pause");
}
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What might be the problem?
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I think I see the problem, but no idea if what I see is what you are getting. It helps to say what the problem is.
But use a debugger, GDB is free GDB: The GNU Project Debugger you can cycle line by line of your code and see if it is doing what you want.
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Hmm, you have printf statements with no format string, you try to scanf into a char literal, you declared main incorrectly, there are multiple places where integer division could mess you up, ect. Maybe you could post a specific concern, however before you do that I suggest you re-read through whatever text book you are using. Here are some other good sources:
