Lab 6 tasks

Lab 6/main.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+char* getInput();
+char* getElement();
+
+int main() {
+    char* function;
+    function = getInput();
+    int funSize = strlen(function) + 1;
+    
+    char* a;
+    char* b;
+    char* c;
+    
+    a = getElement(function);
+    int startB = strlen(a) + 4;
+        
+    char newFunc[funSize];
+    
+    int location = 0;
+    for (int i = startB - 1; i < funSize; i++) {
+        newFunc[location++] = function[i];
+    }
+    b = getElement(newFunc);
+    
+    int startC = strlen(b) + 1 + startB;
+    location = 0;
+    for (int i = startC - 1; i < funSize; i++) {
+        newFunc[location++] = function[i];
+    }
+    c = getElement(newFunc);
+    
+    int A = atoi(a);
+    int B = atoi(b);
+    int C = atoi(c);
+        
+    float result1 = (-B + sqrt(pow(B, 2) - 4 * A * C)) / (2 * A);
+    float result2 = (-B - sqrt(pow(B, 2) - 4 * A * C)) / (2 * A);
+    
+    if (!isnan(result1)) printf("Result 1: %f\n", result1);
+    else printf("Result 1 is not real\n");
+    
+    if (!isnan(result2)) printf("Result 2: %f\n", result2);
+    else printf("Result 2 is not real\n");
+    
+    free(function);
+    free(a);
+    free(b);
+    free(c);
+    
+    return (EXIT_SUCCESS);
+}
+
+char* getElement(char function[]) {
+    char* element;
+    int funSize = strlen(function);
+    int size = 1, location = 0;
+    
+    element = malloc(size * sizeof(char));
+    for (int i = 0; i < funSize; i++) {
+        if (function[i] != 'x') {
+            element[location++] = function[i];
+            if (location > size) {
+                element = realloc(element, ++size * sizeof(char));
+            }
+        } else {
+            element[location] = '\0';
+            return element;
+        }
+    }
+    element[location] = '\0';
+    return element;
+}
+
+char* getInput() {
+    int size = 9;
+    
+    char* function;
+    function = malloc(size * sizeof(char));
+    printf("Please input function: ");
+    
+    char c;
+    int location = 0;
+    
+    while((c = getc(stdin)) != 10) {
+        function[location++] = c;
+        if (location > size) {
+            function = realloc(function, ++size * sizeof(char));
+        }
+    }
+    function[location] = '\0';
+    return function;
+}
\ No newline at end of file