编译错误,包括'之前的初始化程序。代币

时间:2015-06-24 22:07:51

标签: c++ compiler-construction compiler-errors object-initializers

我正在为一个Project Euler难题编写这段代码来练习编码,我遇到的问题是我认为是一些语法错误。我在这里做错了什么?

#include <iostream>
#include <string>

using namespace std;

int main()
{
    int smallestMultiple = 10000;
    int sum = 1;

    for (int i = 100, i < smallestMultiple, i+2)
    {
        for (int j = 20, j >=10, j--)
        {
            sum = sum + (i % j);

        }

        if (sum == 1)
        {
            smallestMultiple = i;
        }

        else 
        {
            sum = 1;
        }
    }

    cout<< "The smallest number easily divisible by the numbers 1 to 20 is " << smallestMultiple << "." << endl;
}

我在尝试编译此代码时收到以下错误。我错过了什么类型的语法?

smallMultiple.cpp:6: error: expected ‘;’ before ‘int’
smallMultiple.cpp: In function ‘int main()’: 
smallMultiple.cpp:12: error: expected initializer before ‘<’ token
smallMultiple.cpp:32: error: expected primary-expression at end of input
smallMultiple.cpp:32: error: expected ‘;’ at end of input
smallMultiple.cpp:32: error: expected primary-expression at end of input
smallMultiple.cpp:32: error: expected ‘)’ at end of input
smallMultiple.cpp:32: error: expected statement at end of input
smallMultiple.cpp:32: error: expected ‘}’ at end of input

2 个答案:

答案 0 :(得分:0)

这里有几个问题:

  1. for循环的部分应使用分号(;)分隔,而不是逗号(,
  2. 在第一个for循环中,i + 2未存储在任何位置。假设您打算将2添加到i的值,则应使用i+=2
  3. 因此,总之,您的for循环应如下所示:

    for (int i = 100; i < smallestMultiple; i+=2)
    {
        for (int j = 20; j >=10; j--)
        {
            // rest of the code
    

答案 1 :(得分:0)

用于的用法;为了区分三个表达式(初始化,条件和更新),因此你应该写:

for (int i = 100; i < smallestMultiple; i+=2)

而不是:

for (int i = 100, i < smallestMultiple, i+2)

如果你想将i从100迭代到最小的多个,增量为2