Question

How to remove the second digit from a number in C++

Answer 1

#include <iostream> 
#include <sstream> 

unsigned int remove_the_second_digit(unsigned int n) {
    std::cout << n << "\n";  
        
    std::stringstream ss;  
    ss << n;  
       
    std::string s;  
    ss >> s;  
       
    s.erase(s.begin() + 1); 
       
    std::stringstream().swap(ss);
    ss << s;
       
    ss >> n;
    
    return n;
}
 
int main() {  
    unsigned int n = 8405796; 
     
    n = remove_the_second_digit(n);
         
    std::cout << n;  
}  
    
    
    
    
/*
run:
    
8405796
805796
    
*/

 

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