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How to Split strings in C++
The C++ can split a string into substrings using various techniques. Here are two common methods: using std::istringstream and using std::getline().
Method 1: Using std::istringstream:
C++
#include <iostream>
#include <sstream>
#include <vector>
#include <string>
int main() {
std::string inputString = "This is a sample string to split";
std::istringstream iss(inputString);
std::vector<std::string> tokens;
std::string token;
while (std::getline(iss, token, ' ')) {
tokens.push_back(token);
}
// Display the split substrings
for (const std::string& str : tokens) {
std::cout << str << std::endl;
}
return 0;
}In this example:
- We create a
std::istringstreamobject namedissand initialize it with the input string. - We use a
whileloop andstd::getline()to split the string by space (‘ ‘) and store the substrings in a vector (tokensin this case). - Finally, we loop through the vector to display the split substrings.
Method 2: Using std::getline() directly:
C++
#include <iostream>
#include <string>
#include <vector>
int main() {
std::string inputString = "This is a sample string to split";
std::vector<std::string> tokens;
std::istringstream iss(inputString);
std::string token;
while (std::getline(iss, token, ' ')) {
tokens.push_back(token);
}
// Display the split substrings
for (const std::string& str : tokens) {
std::cout << str << std::endl;
}
return 0;
}Both methods accomplish the same task of splitting a string into substrings based on a delimiter (‘ ‘ in this case). You can replace the space character with any other delimiter as needed.
Remember to include the necessary headers (#include <iostream>, #include <sstream>, #include <string>, and #include <vector>) at the beginning of your code.