34 lines
725 B
C
34 lines
725 B
C
/* Programme qui lit et affiche les caractères */
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#include <stdio.h>
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#include <math.h>
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struct Complex {
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double a;
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double b;
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};
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int main() {
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double a, b, c;
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printf("Saisissez les réels a≠0, b et c séparés par une virgule\n");
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scanf("%lf,%lf,%lf", &a, &b, &c);
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if (a == 0) {
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printf("On a dit a≠0 !\n");
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} else {
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double d = pow(b,2)-4*a*c;
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printf("%lf\n", d);
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if (d == 0) {
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printf("x0 = %lf", -b/2*a);
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} else if (d > 0) {
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printf("x1 = %lf; x2 = %lf", (-b+sqrt(d))/2*a, (-b-sqrt(d))/2*a);
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} else {
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struct Complex z1,z2;
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z1.a = z2.a = pow(b,2)/2*a;
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z1.b = sqrt(-d)/2*a;
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z2.b = -sqrt(-d)/2*a;
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printf("z1 = %lf+i%lf; z2 = %lf+i%lf\n", z1.a, z1.b, z2.a, z2.b);
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}
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}
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return 0;
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}
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