Difference between revisions of "Directory:Derek Elder/Programs/Quadratic Formula"
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int main() | int main() | ||
{ | { | ||
− | |||
int A = 0; | int A = 0; | ||
int B = 0; | int B = 0; | ||
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double discrim = sqrt((B * B) - 4 * A * C); | double discrim = sqrt((B * B) - 4 * A * C); | ||
− | double imaginary_discrim = sqrt(-((B * B) - 4 * A * C)); | + | double imaginary_discrim = sqrt(-((B * B) - (4 * A * C))); |
− | if (discrim >= 0) | + | if(discrim >= 0) |
{ | { | ||
cout<<"The value of the discriminant is: "<<discrim<<"\n"; | cout<<"The value of the discriminant is: "<<discrim<<"\n"; | ||
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if(A != 0) | if(A != 0) | ||
{ | { | ||
− | if(A <0) | + | if(A < 0) |
{ | { | ||
A *= -1; | A *= -1; | ||
Line 45: | Line 44: | ||
{ | { | ||
cout<<"When A = "<<A<<", B = "<<B<<", and C = "<<C<<", the two real solutions are:"<<"\n"; | cout<<"When A = "<<A<<", B = "<<B<<", and C = "<<C<<", the two real solutions are:"<<"\n"; | ||
− | cout<<"X = "<<(-B + discrim)/(2.0 * A)<<"\n"; | + | cout<<"X = "<<((-B + discrim)/(2.0 * A))<<"\n"; |
− | cout<<"X = "<<(-B - discrim)/(2.0 * A)<<"\n"; | + | cout<<"X = "<<((-B - discrim)/(2.0 * A))<<"\n"; |
} | } | ||
else if (discrim == 0) | else if (discrim == 0) | ||
{ | { | ||
cout<<"When A = "<<A<<", B = "<<B<<", and C = "<<C<<", the one real solution is:"<<"\n"; | cout<<"When A = "<<A<<", B = "<<B<<", and C = "<<C<<", the one real solution is:"<<"\n"; | ||
− | cout<<"X = "<<-B /(2.0 * A)<<"\n"; | + | cout<<"X = "<<(-B/(2.0 * A))<<"\n"; |
} | } | ||
else | else | ||
{ | { | ||
cout<<"When A = "<<A<<", B = "<<B<<", and C = "<<C<<", the two imaginary solutions are:"<<"\n"; | cout<<"When A = "<<A<<", B = "<<B<<", and C = "<<C<<", the two imaginary solutions are:"<<"\n"; | ||
− | cout<<"X = "<<-B / (2.0 * A)<<" + "<<imaginary_discrim /(2 * A)<<"i"<<"\n"; | + | cout<<"X = "<<(-B/(2.0 * A))<<" + "<<(imaginary_discrim/(2 * A))<<"i"<<"\n"; |
− | cout<<"X = "<<-B / (2.0 * A)<<" - "<<imaginary_discrim /(2 * A)<<"i"<<"\n"; | + | cout<<"X = "<<(-B/(2.0 * A))<<" - "<<(imaginary_discrim/(2 * A))<<"i"<<"\n"; |
} | } | ||
Latest revision as of 17:32, 6 May 2008
#include <iostream> #include <cmath> using namespace std; double sqrt(int discrim) { return sqrt(double(discrim)); } int main() { int A = 0; int B = 0; int C = 0; cout<<"Please enter a value for A: "; cin>>A; cout<<"Please enter a value for B: "; cin>>B; cout<<"Please enter a value for C: "; cin>>C; double discrim = sqrt((B * B) - 4 * A * C); double imaginary_discrim = sqrt(-((B * B) - (4 * A * C))); if(discrim >= 0) { cout<<"The value of the discriminant is: "<<discrim<<"\n"; } else { cout<<"The value of the discriminant is: "<<imaginary_discrim<<"i"<<"\n"; } if(A != 0) { if(A < 0) { A *= -1; } if (discrim > 0) { cout<<"When A = "<<A<<", B = "<<B<<", and C = "<<C<<", the two real solutions are:"<<"\n"; cout<<"X = "<<((-B + discrim)/(2.0 * A))<<"\n"; cout<<"X = "<<((-B - discrim)/(2.0 * A))<<"\n"; } else if (discrim == 0) { cout<<"When A = "<<A<<", B = "<<B<<", and C = "<<C<<", the one real solution is:"<<"\n"; cout<<"X = "<<(-B/(2.0 * A))<<"\n"; } else { cout<<"When A = "<<A<<", B = "<<B<<", and C = "<<C<<", the two imaginary solutions are:"<<"\n"; cout<<"X = "<<(-B/(2.0 * A))<<" + "<<(imaginary_discrim/(2 * A))<<"i"<<"\n"; cout<<"X = "<<(-B/(2.0 * A))<<" - "<<(imaginary_discrim/(2 * A))<<"i"<<"\n"; } } else cout<<"There is no solution for the equation when A = 0."<<"\n"; return 0; }