C++如果語句錯誤：預期';'之前，「{」令牌

Question

我在寫這一點的樂趣：

#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; 
    } 
} 

，我試圖編譯它在G ++，但我得到這個錯誤：

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

我不知道我做錯了，我的學校的CS導師也沒有。儘管這只是爲了好玩，但卻讓我發瘋。

Answer 1

你錯過了一個if這裏：

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

同時，也不好把

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

main之前。另一點是你應該在撥打rand()之前先設置隨機種子。

你if-else可以如下簡化：

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;