Question

How to remove leading zeros from a string in C++

Answer 1

#include <iostream>
#include <string>

std::string removeLeadingZeros(const std::string &str) {
    size_t start = str.find_first_not_of('0');
    
    if (start == std::string::npos) {
        return ""; // If all characters are zeros, return ""
    }
    
    return str.substr(start);
}

int main() {
    std::string str = "0000457833.8091";
    
    str = removeLeadingZeros(str);
    
    std::cout << str << std::endl;
}



/*
run:

457833.8091

*/

 

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