Geoffrey Frogeye
284a26cbd3
Précisément :
scanf("%d %f %lf", int, float, double)
printf("%d %f %f", int, float, double)
28 lines
751 B
C
28 lines
751 B
C
/* Affiche les solutions à une équation du second degré */
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#include <stdio.h>
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#include <math.h>
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#include <complex.h>
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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("%f\n", d);
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if (d == 0) {
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printf("x0 = %f", -b/2*a);
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} else if (d > 0) {
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printf("x1 = %f; x2 = %f", (-b+sqrt(d))/2*a, (-b-sqrt(d))/2*a);
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} else {
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double complex z1 = pow(b,2)/2*a + sqrt(-d)/2*a * I;
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double complex z2 = pow(b,2)/2*a - sqrt(-d)/2*a * I;
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printf("z1 = %f+i%f; z2 = %f+i%f\n", creal(z1), cimag(z1), creal(z2), cimag(z2));
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}
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}
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return 0;
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}
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