这些错误是什么？我怎么修理它们？

Question

我正在学习c ++,我正在写一个卡片经销商计划.当我编译我的代码时,我得到这些错误:

dealer3.cpp:12: error: expected initializer before ‘int’
dealer3.cpp:33: error: expected constructor, destructor, or type conversion before ‘=’ token
dealer3.cpp:34: error: expected constructor, destructor, or type conversion before ‘=’ token
dealer3.cpp:35: error: expected constructor, destructor, or type conversion before ‘=’ token
dealer3.cpp:36: error: expected constructor, destructor, or type conversion before ‘=’ token
dealer3.cpp:37: error: expected constructor, destructor, or type conversion before ‘<<’ token
dealer3.cpp:38: error: expected declaration before ‘}’ token

这是我的代码

#include<iostream>
#include<time.h>
#include<stdlib.h>
#include<cmath>

using namespace std;

int randn(int n);
void draw();
int uni(int n);
char *suits[4]={"Hearts","Diamonds","spades","clubs"};
char *ranks[13]={"ace","two","three","four","five","six","seven","eight","nine","ten","jack","queen","king"};
int drawn[52];
int remaining=52;
int main() {
    int n;
    int i;
    srand(time(NULL));
    while(1) {
       cout<<"enter number of cards to draw"<<endl;
       cin>>n;
       if (n==0) break;

for (i=1; i<=n; i++)
    draw();
}

    return 0;
}
int r;
int s;
int n;
int card;
n=randn(remaining--);
card=uni(n);
    r=card%13;
    s=card/13;
    cout<<ranks[r]<<" of "<<suit[s]<<endl;
}
int uni(int n)
{
int i=0;
while (drawn[i])
    i++;
while (n-->0){
    i++;
while (drawn[i])
    i++;
}
card_drawn([i])=true;
return i;
}
int randn (int n){
return rand()%n;
}

为什么是这样？

Answer 1

实际上,这是一个很好的案例,其中缩进代码可以解决您的问题(或使解决方案非常明显),因为它会显示您的大括号中的几个错误.您有几行代码不在任何属于那里的函数之外.

一些格式提示:

• 将每个嵌套的代码块缩进固定数量的空格(通常为4).
• 在每个功能后留一个空白行.
• 当为函数或for- ,while- 或 - if语句打开一个新块时(列表继续),请注意一致地放置左括号(代码中的样式相同).
• 确保关闭块的括号与打开它的语句/括号处于同一缩进级别.

请注意,大多数IDE都有一些选项可以自动为您修复格式(尤其是缩进).