Expanded main function with operation handler processing methods

src/main.c

@@ -14,4 +14,17 @@ int main() {
     }
     printf("\nPlease enter the first and the second number separated by a space...\n");
 
+    while(fgets(buffer, 100, stdin)) {
+        buffer[strcspn(buffer, "\n")] = '\0';
+        if (strlen(buffer) > 0) {
+            break;
+        }
+    }
+
+    int* result = evaluateInput(buffer, input);
+    if(result == NULL) {
+        printf("\nInvalid formatting. Two numbers need to be separated by a space\n");
+        return 0;
+    }
+    printf("\nResult: %d", *result);
 }