du3

du3/program.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#define MAX 100
+
+
+int je_cislo(const char *u) {
+    char *koniec;
+    strtod(u, &koniec);
+    return *koniec == '\0';
+}
+
+int main() {
+    char riadok[MAX];
+    double cislo1, cislo2, vysledok, skutocny_vysledok;
+    char operacia;
+
+    while (fgets(riadok, MAX, stdin) != NULL) {
+        if (strlen(riadok) <= 1) break; //konec
+        
+        if (sscanf(riadok, " %lf %c %lf = %lf", &cislo1, &operacia, &cislo2, &vysledok) != 4) {
+            printf("CHYBA\n");
+            continue;
+        }
+        
+        switch (operacia) {
+            case '+': skutocny_vysledok = cislo1 + cislo2; break;
+            case '-': skutocny_vysledok = cislo1 - cislo2; break;
+            case '*': skutocny_vysledok = cislo1 * cislo2; break;
+            case '/': 
+                if (cislo2 == 0) {
+                    printf("CHYBA\n");
+                    continue;
+                }
+                skutocny_vysledok = cislo1 / cislo2;
+                break;
+            default:
+                printf("CHYBA\n");
+                continue;
+        }
+        
+        if (abs(skutocny_vysledok - vysledok) < 0.005) {
+            printf("OK\n");
+        } else {
+            printf("ZLE\n");
+        }
+    }
+    return 0;
+}
+