C++ 将字符串转换为 ASCII
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原文地址: http://stackoverflow.com/questions/6709795/
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Converting string to ASCII
提问by E.O.
I was just trying something out and made the following code. It is supposed to take each individual letter in a string and print its ASCII equivalent. However, when there is a space, it stops converting. Here is the code:
我只是在尝试一些东西并制作了以下代码。它应该采用字符串中的每个单独的字母并打印其 ASCII 等效项。但是，当有空格时，它会停止转换。这是代码：
#include <iostream>
#include <string>
using namespace std;
void convertToASCII(string letter)
{
for (int i = 0; i < letter.length(); i++)
{
char x = letter.at(i);
cout << int(x) << endl;
}
}
int main()
{
string plainText;
cout << "Enter text to convert to ASCII: ";
cin >> plainText;
convertToASCII(plainText);
return 0;
}
Any ideas on why this happens?
关于为什么会发生这种情况的任何想法？
回答by Rob?
cin >> plainTextreads from the input up to, but excluding, the first whitespace character. You probably want std::getline(cin, plainText)instead.
cin >> plainText从输入中读取，但不包括第一个空白字符。你可能想要std::getline(cin, plainText)。
References:
参考：
回答by Sven
The formatted input function operator>>on istreamstops extraction from the stream if it hits a space. So your string doesn't contain the rest of the input.
格式化的输入功能operator>>上istream，如果它击中的空间从流将停止提取。所以你的字符串不包含输入的其余部分。
If you wish to read until the end of the line, use getlineinstead:
如果您希望阅读到行尾，请getline改用：
string plainText;
cout << "Enter text to convert to ASCII: ";
getline(cin, plainText);
convertToASCII(plainText);
回答by Nirzak
Just Use getline and then no need such things you can just typecast to int a string letter to directly convert it to ascii.Here Is My Code.
只需使用getline，然后不需要这些东西，您只需将字符串类型转换为int 字符串即可将其直接转换为ascii。这是我的代码。
#include <iostream>
#include <string>
using namespace std;
void convertToASCII(string s)
{
for (int i = 0; i < s.length(); i++)
{
cout << (int)s[i]<< endl;
}
}
int main()
{
string plainText;
cout << "Enter text to convert to ASCII: ";
getline(cin,plainText);
convertToASCII(plainText);
return 0;
}
回答by nelavara
Here is something I put together. I used a vector to store all of the ASCII values that are to be generated. We first ask the user for a string. Then we use type casting and add the values to a vector. We also use a while loop to prevent the user from not entering nothing.
这是我放在一起的东西。我使用了一个向量来存储所有要生成的 ASCII 值。我们首先向用户询问一个字符串。然后我们使用类型转换并将值添加到向量中。我们还使用 while 循环来防止用户不输入任何内容。
# include <iostream>
# include <string>
# include <vector>
std::vector<int> converttoASCII (std::string s) //used a vector to store all our ASCII values
{
std::vector <int> vals; //vectpr creation
int ascChar;
for (int i = 0; i < s.length(); i++) //We interate through string passed and add to vectors
{
ascChar = s[i];
vals.push_back(ascChar);
}
return vals;
}
int main()
{
std::string toencode;
std::cout << "Please enter in a string to encode: ";
std::getline(std::cin, toencode);
while (toencode.length() == 0) //we used a for loop to prevent user from entering nothing.
{
std::cin.clear();
std::cout << "Must not be empty! Try Again.\n";
std::cout << "Please enter in a string to encode: ";
std::getline(std::cin, toencode);
}
std::vector <int> asciivals = converttoASCII(toencode);
for (int i : asciivals) //Print out the results of the vector
{
std::cout << i << "\n";
}
return 0;
}
References:
参考：
回答by Vishal Bajaj
cin.ignore();
cin.getline(plaintext,100); // 100 (assumed) is the size of plaintext
Use these two lines of code to accept a string with blank spaces.
使用这两行代码接受带有空格的字符串。
