feet : initial commit of all the files

polynome.c

@@ -0,0 +1,197 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <math.h>
+#include "polynome.h"
+
+enum STATUS Calcul_Delta(Poly* poly) {
+    if (poly == NULL) {
+        return FAIL;
+    }
+
+    poly->delta = (poly->b * poly->b) - (4 * poly->a * poly->c);
+    return OK;
+}
+
+enum STATUS Calcul_x1_x2(Poly* poly) {
+    if (poly == NULL) {
+        return FAIL;
+    }
+
+    poly->x1 = (-poly->b - sqrt(poly->delta)) / (2 * poly->a);
+    poly->x2 = (-poly->b + sqrt(poly->delta)) / (2 * poly->a);
+
+    return OK;
+}
+
+enum STATUS Calcul_x0(Poly* poly) {
+    if (poly == NULL) {
+        return FAIL;
+    }
+
+    poly->x0 = -poly->b / (2 * poly->a);
+
+    return OK;
+}
+
+enum STATUS Calcul_Sommet(Poly* poly) {
+    if (poly == NULL) {
+        return FAIL;
+    }
+
+    poly->sx = -poly->b / (2 * poly->a);
+
+    float result;
+    if (Calcul_Fonction(poly, poly->sx, &result) == FAIL) {
+        return FAIL;
+    }
+
+    poly->sy = result;
+
+    return OK;
+}
+
+enum STATUS Calcul_Fonction(Poly* poly, float x, float *out) {
+    if (poly == NULL) {
+        return FAIL;
+    }
+
+    *out = poly->a * x * x + poly->b * x + poly->c;
+    return OK;
+}
+
+enum STATUS Dessiner_Graph(Poly* poly) {
+    if (poly == NULL) {
+        return FAIL;
+    }
+
+    printf("\n");
+    for (int j = LONGUEUR_Y; j >= 1; j--) {
+
+        if (j == 10) {
+            printf("%d  | ",j);
+        }
+        else {
+            printf("%d   | ",j);
+        }
+
+        for (int i = 1; i <= LONGUEUR_X; i++) {
+            float y;
+            if (Calcul_Fonction(poly, i, &y) == FAIL) {
+                return FAIL;
+            }
+
+            if (roundf(y) == j) {
+                printf("o ");
+            }
+            else {
+                printf("  ");
+            }
+        }
+        printf("\n");
+    }
+
+    //          | 1 2 3 4 5 6 7 8 9 10
+    printf("----+---------------------\n");
+    printf("    | ");
+    for (int k = 1; k <= LONGUEUR_Y; k++) {
+        printf("%d ",k);
+    }
+    printf("\n----+---------------------\n");
+
+    for (int j = 0; j >= -LONGUEUR_Y; j--) {
+
+        if (j == -10) {
+            printf("%d | ",j);
+        }
+        else if (j == 0) {
+            printf("%d   | ",j);
+        }
+        else {
+            printf("%d  | ",j);
+        }
+
+        for (int i = 1; i <= LONGUEUR_X; i++) {
+            float y;
+            if (Calcul_Fonction(poly, i, &y) == FAIL) {
+                return FAIL;
+            }
+
+            if (roundf(y) == j) {
+                printf("o ");
+            }
+            else {
+                printf("  ");
+            }
+        }
+        printf("\n");
+    }
+
+    printf("\n");
+    return OK;
+}
+
+int main(int argc, char* argv[]) {
+    if (argc < 4) {
+        fprintf(stderr, "%s", "[-] usage : poly.exe a b c\n");
+        return 1;
+    }
+
+    float a = atof(argv[1]);
+    float b = atof(argv[2]);
+    float c = atof(argv[3]);
+
+    printf("[+] Processing %.3fx^2%.3fx%.3f\n", a, b, c);
+
+    Poly* poly = malloc(sizeof(Poly));
+    poly->a = a;
+    poly->b = b;
+    poly->c = c;
+
+    if (Calcul_Delta(poly) == FAIL) {
+        fprintf(stderr, "%s", "[-] Error while calculating delta.\n");
+    }
+    else {
+        printf("[+] Delta : %.3f\n",poly->delta);
+    }
+
+    if (poly->delta > 0) {
+        printf("[+] The polynomial admits 2 solutions x1 and x2.\n");
+        
+        if (Calcul_x1_x2(poly) == OK) {
+            printf("[+] x1 : %.4f\n",poly->x1);
+            printf("[+] x2 : %.4f\n",poly->x2);
+        }
+        else {
+            fprintf(stderr, "%s", "[-] Error while calculating x1 or x2.\n");
+        }
+    }
+    else if (poly->delta == 0) {
+        printf("[+] The polynomial admits 1 solution x0\n");
+
+        if (Calcul_x0(poly) == OK) {
+            printf("[+] x0 : %.4f\n",poly->x0);
+        }
+        else {
+            fprintf(stderr, "%s", "[-] Error while calculating x0.\n");
+        }
+    }
+    else {
+        printf("[+] The polynomial has no solution\n");
+    }
+
+    if (Calcul_Sommet(poly) == FAIL) {
+        fprintf(stderr, "%s", "[-] Error while calculating vertex coordinates.\n");
+    }
+    else {
+        printf("[+] Vertex coordinates : S = (%.4f,%.4f)\n",poly->sx,poly->sy);
+    }
+
+    printf("[+] Drawing the graph...\n");
+    if (Dessiner_Graph(poly) == FAIL) {
+        fprintf(stderr, "%s", "[-] Error while drawing the graph.\n");
+    }
+
+    free(poly);
+    return 0;
+}