String concatenation
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String concatenation
String concatenation is the process of joining two or more strings together to form a new string. In C++, there are several ways to concatenate strings:
- Using the + operator:
You can use the + operator to concatenate two strings. For example:
std::string
str1 = "Hello";
std::string
str2 = "world";
std::string
result = str1 + " " + str2;
//result = "Hello world"
- Using the append() function:
The append() function can be used to add one string to the end of another string. For example:
std::string
str1 = "Hello";
std::string
str2 = "world";
str1.append("");
str1.append(str2);
//str1 = "Hello world"
- Using the += operator:
The += operator can be used to concatenate one string to another string. For example:
std::string str1 = "Hello";
std::string str2 = "world";
str1 +=" ";
str1 +=str2;
// str1= "Hello world"
Note that in all of these examples, the original strings are not modified. Instead, a new string is created that contains the concatenated result. If you want to modify one of the original strings, you can use the append() or += operator on the original string directly.
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