C++ 程序错误（修复）

Question

需要帮助修复此代码我是 c++ 的新手：我在输入错误结束时得到预期的“}”。我今天站了一会儿试图解决这个问题，我在 windows 7 上使用 eclipse，但是对于 none 我提出的所有想法都帮助我解决了这个问题。

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

int main ()
{

    // Get seed color
    string seedColor = "";
    cout << "Enter the seed color (red or blue): \n";
    cin >> seedColor;

    // Get temp
    int temp = 0;
    cout << "Enter the temperature (F): \n";
    cin >> temp;


    // Get the soil moisture
    string soilMoisture = "";
    cout << "Enter the soil moisture (wet or dry): \n";
            cin >> soilMoisture;
    // if red seed
    if(seedColor == "red")
    {

        // If temp >= 75
        if(temp >= 75)
        {

        // if the soil is wet
            if(soilMoisture == "wet")
            {
         // output sunflower
                cout << "A sunflower will grow.\n";
            }

        // if the soil is dry
            if(soilMoisture == "dry")
            {
        // output dandelion
                cout << "A dandelion will grow.\n";
            }
        }
        // otherwise
        else
        {
        // output mushroom
            cout << "a nasty mushroom will form!\n";
    }
        // if blue seed
    if(seedColor == "blue")
    {
        // If temp is between 60 and 70
    if(temp >= 60 && temp <= 70)
    {
        // If the soil is wet
    if(soilMoisture == "wet")
    {
        // output dandelion
        cout << "A beautiful dandelion will grow.\n";
    }

        // If the soil is dry
    if(soilMoisture == "dry")
    {
        // output sunflower
        cout << "A sunflower will grow out of the earth!\n";
    }
    }
        // otherwise
    else
    {
        // output mushroom
        cout << "You will produce a mushroom.\n";
        }

    return 0;
    }

Answer 1

您忘记“}”的地方并不明显。例如，它可以在最后一个 else 之前，但也可以在其他任何地方。

您应该正确地缩进您的代码。比你自己会看到你的错误。

Answer 2

简短回答： 您没有正确关闭 if(seedColor == "red") 和 if(seedColor == "blue") 块（除非种子可能同时是红色和蓝色最后省略了一些代码，我认为情况并非如此。

更长且更有建设性的回答：您遇到这个问题主要是因为缩进问题，使您很难从视觉上识别出这种情况正在发生。您可能习惯于在编写代码时手动执行此操作，但是有一些工具可以做到这一点。假设您没有使用完整的 IDE，例如 Eclipse CDT 或 visual studio（否则 IDE 可能已经处理了缩进）。

作为示例，您的代码经过更正和正确的缩进，如下所示。

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

int main() {

    // Get seed color
    string seedColor = "";
    cout << "Enter the seed color (red or blue): \n";
    cin >> seedColor;

    // Get temp
    int temp = 0;
    cout << "Enter the temperature (F): \n";
    cin >> temp;

    // Get the soil moisture
    string soilMoisture = "";
    cout << "Enter the soil moisture (wet or dry): \n";
    cin >> soilMoisture;
    // if red seed
    if (seedColor == "red") {

        // If temp >= 75
        if (temp >= 75) {

            // if the soil is wet
            if (soilMoisture == "wet") {
                // output sunflower
                cout << "A sunflower will grow.\n";
            }

            // if the soil is dry
            if (soilMoisture == "dry") {
                // output dandelion
                cout << "A dandelion will grow.\n";
            }
        }
        // otherwise
        else {
            // output mushroom
            cout << "a nasty mushroom will form!\n";
        }
    }
    // if blue seed
    if(seedColor == "blue")
    {
        // If temp is between 60 and 70
        if(temp >= 60 && temp <= 70)
        {
            // If the soil is wet
            if(soilMoisture == "wet")
            {
                // output dandelion
                cout << "A beautiful dandelion will grow.\n";
            }

            // If the soil is dry
            if(soilMoisture == "dry")
            {
                // output sunflower
                cout << "A sunflower will grow out of the earth!\n";
            }
        }
        // otherwise
        else
        {
            // output mushroom
            cout << "You will produce a mushroom.\n";
        }

    }
    return 0;
}

Answer 3

您错过了 (}) 的 if 条件。

一个在 if(seedColor == "red")

和其他 if(seedColor == "blue")

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

int main ()
{

// Get seed color
string seedColor = "";
cout << "Enter the seed color (red or blue): \n";
cin >> seedColor;

// Get temp
int temp = 0;
cout << "Enter the temperature (F): \n";
cin >> temp;


// Get the soil moisture
string soilMoisture = "";
cout << "Enter the soil moisture (wet or dry): \n";
        cin >> soilMoisture;
// if red seed
if(seedColor == "red")
{

    // If temp >= 75
    if(temp >= 75)
    {

    // if the soil is wet
        if(soilMoisture == "wet")
        {
     // output sunflower
            cout << "A sunflower will grow.\n";
        }

    // if the soil is dry
        if(soilMoisture == "dry")
        {
    // output dandelion
            cout << "A dandelion will grow.\n";
        }
    }
    // otherwise
    else
    {
    // output mushroom
        cout << "a nasty mushroom will form!\n";
    }
} // <--
    // if blue seed
if(seedColor == "blue")
{
    // If temp is between 60 and 70
    if(temp >= 60 && temp <= 70)
    {
        // If the soil is wet
        if(soilMoisture == "wet")
        {
            // output dandelion
            cout << "A beautiful dandelion will grow.\n";
        }

            // If the soil is dry
        if(soilMoisture == "dry")
        {
            // output sunflower
            cout << "A sunflower will grow out of the earth!\n";
        }
    }
    // otherwise
    else
    {
        // output mushroom
        cout << "You will produce a mushroom.\n";
    }
} // <--
return 0;
}

C++ 程序错误（修复）

c++ program error (fix)

c++

syntax