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50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/*
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* C program to find out the roots of a quadratic equation
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* for non-zero coefficients. In case of errors the program
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* should report suitable error message.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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void main()
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{
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float a, b, c, root1, root2;
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float realp, imagp, disc;
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printf("Enter the values of a, b and c \n");
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scanf("%f %f %f", &a, &b, &c);
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/* If a = 0, it is not a quadratic equation */
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if (a == 0 || b == 0 || c == 0)
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{
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printf("Error: Roots cannot be determined \n");
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exit(1);
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}
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else
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{
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disc = b * b - 4.0 * a * c;
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if (disc < 0)
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{
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printf("Imaginary Roots\n");
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realp = -b / (2.0 * a) ;
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imagp = sqrt(abs(disc)) / (2.0 * a);
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printf("Root1 = %f +i %f\n", realp, imagp);
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printf("Root2 = %f -i %f\n", realp, imagp);
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}
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else if (disc == 0)
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{
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printf("Roots are real and equal\n");
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root1 = -b / (2.0 * a);
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root2 = root1;
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printf("Root1 = %f\n", root1);
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printf("Root2 = %f\n", root2);
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}
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else if (disc > 0 )
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{
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printf("Roots are real and distinct \n");
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root1 =(-b + sqrt(disc)) / (2.0 * a);
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root2 =(-b - sqrt(disc)) / (2.0 * a);
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printf("Root1 = %f \n", root1);
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printf("Root2 = %f \n", root2);
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}
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}
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} |