[Solved] C++ declaring variable and console [closed]

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The problem here is that you are trying to print the length before taking an input.
The cout<<length will print a garbage value since length hasn’t been assigned yet. Try this instead. Also don’t use using namespace std;

#include<iostream>
int main(){
    int length;
    std::cout << "Input length of a square in centimeter ";
    std::cin >> length;
    std::cout << length;
}

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solved C++ declaring variable and console [closed]