C ++ If語句錯誤：預期為';' 在“ {”令牌之前

Question

我寫這個很有趣：

#include <iostream>
#include <cstdlib>
using namespace std;

int Arsenal = rand()%3;
int Norwich = rand()%3;

int main () {
  if (Arsenal > Norwich) {
    cout << "Arsenal win the three points, they are in the Top Four";
    return 0;
  } else if (Arsenal == Norwich) {
    cout << "The game was a draw, both teams gained a point";
    return 0;
  } else (Norwich > Arsenal) {
      cout << "Norwich won, Arsenal lost";
      return 0;
    }
}

我試圖在g ++中編譯它，但出現了這個錯誤：

arsenalNorwich.cpp: In function, 'int main'
arsenalNorwich.cpp:15:30: error: expected ';' before '{' token

我不知道我做錯了什么，我學校的CS導師也不知道。 盡管這只是為了娛樂，但它使我發瘋。

Answer 1

if您if這里錯過了一個：

  else if (Norwich > Arsenal)
  ///^^^if missing

同時，放不好

 int Arsenal = rand()%3;
 int Norwich = rand()%3;

前main 。 還有一點是，您應該在調用rand()之前首先設置隨機種子。

您的if-else可以簡化如下：

if (Arsenal > Norwich) {
   cout << "Arsenal win the three points, they are in the Top Four";
} else if (Arsenal == Norwich) {
   cout << "The game was a draw, both teams gained a point";
} else { //^^^no need to compare values again since it must be Norwich > Arsenal
         //when execution reaches this point
   cout << "Norwich won, Arsenal lost";
}
return 0;