如何从C ++中的字符串中删除某些字符? [英] How to remove certain characters from a string in C++?
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问题描述
例如,我有一个用户输入电话号码。
For example I have a user input a phone number.
cout << "Enter phone number: ";
INPUT: (555) 555-5555
cin >> phone;
我想从字符串中删除(,)和-字符。我已经看过字符串删除,查找和替换函数,但是我只看到它们基于位置进行操作。
I want to remove the "(", ")", and "-" characters from the string. I've looked at the string remove, find and replace functions however I only see that they operate based on position.
是否存在可用于传递的字符串函数一个字符(例如),并删除字符串中的所有实例?
Is there a string function that I can use to pass a character, "(" for example, and have it remove all instances within a string?
推荐答案
string str("(555) 555-5555");
char chars[] = "()-";
for (unsigned int i = 0; i < strlen(chars); ++i)
{
// you need include <algorithm> to use general algorithms like std::remove()
str.erase (std::remove(str.begin(), str.end(), chars[i]), str.end());
}
// output: 555 5555555
cout << str << endl;
用作函数:
void removeCharsFromString( string &str, char* charsToRemove ) {
for ( unsigned int i = 0; i < strlen(charsToRemove); ++i ) {
str.erase( remove(str.begin(), str.end(), charsToRemove[i]), str.end() );
}
}
//example of usage:
removeCharsFromString( str, "()-" );
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