From 8b9cc212e675d5d5fdc38aaeeda1ec6ea7e18ad8 Mon Sep 17 00:00:00 2001
From: Denys Sanchuk <denys.sanchuk@student.tuke.sk>
Date: Tue, 11 Mar 2025 13:32:59 +0000
Subject: [PATCH] Aktualizovat du3/program.c

---
 du3/program.c | 94 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)

diff --git a/du3/program.c b/du3/program.c
index 8b13789..80b91b0 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -1 +1,95 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <math.h>
 
+void strip_spaces(char *str) {
+    char temp[1000];
+    int j = 0;
+    int i = 0;
+
+    while (str[i]) {
+        if (isspace(str[i]) && (j == 0 || isspace(temp[j - 1]) || temp[j - 1] == '=' || temp[j - 1] == '+' || temp[j - 1] == '-' || temp[j - 1] == '*' || temp[j - 1] == '/')) {
+            i++;
+        } else {
+            temp[j++] = str[i++];
+        }
+    }
+    temp[j] = '\0';
+    strcpy(str, temp);
+}
+
+int parse_equation(char *line, double *num1, double *num2, char *op, double *result) {
+    strip_spaces(line);
+
+    char *ptr = line;
+    char *endptr;
+
+    *num1 = strtod(ptr, &endptr);
+    if (ptr == endptr) return 0; 
+    ptr = endptr;
+
+    while (isspace(*ptr)) ptr++;
+    if (*ptr != '+' && *ptr != '-' && *ptr != '*' && *ptr != '/') return 0;
+    *op = *ptr;
+    ptr++;
+
+    while (isspace(*ptr)) ptr++;
+    *num2 = strtod(ptr, &endptr);
+    if (ptr == endptr) return 0; 
+    ptr = endptr;
+
+    while (isspace(*ptr)) ptr++;
+    if (*ptr != '=') return 0;
+    ptr++;
+
+    while (isspace(*ptr)) ptr++;
+    *result = strtod(ptr, &endptr);
+    if (ptr == endptr) return 0; 
+    while (isspace(*endptr)) endptr++;
+    if (*endptr != '\0' && *endptr != '\n') return 0;
+
+    return 1;
+}
+
+double calculate(double num1, double num2, char op) {
+    switch (op) {
+        case '+': return num1 + num2;
+        case '-': return num1 - num2;
+        case '*': return num1 * num2;
+        case '/': return num1 / num2;
+        default: return NAN;
+    }
+}
+
+double round_to_2(double value) {
+    return round(value * 100) / 100;
+}
+
+int main() {
+    char line[1000];
+
+    while (fgets(line, sizeof(line), stdin)) {
+        if (line[0] == '\n') break;  
+
+        double num1, num2, expected_result;
+        char op;
+
+        if (!parse_equation(line, &num1, &num2, &op, &expected_result)) {
+            printf("CHYBA\n");
+            continue;
+        }
+
+        double actual_result = calculate(num1, num2, op);
+        actual_result = round_to_2(actual_result);
+
+        if (actual_result == expected_result) {
+            printf("OK\n");
+        } else {
+            printf("ZLE\n");
+        }
+    }
+
+    return 0;
+}
\ No newline at end of file