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procedure_simplest_1_entrainement.cpp 454 B
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    //============================================================================
    // Name        :
    // Author      : 
    // Version     :
    // Copyright   : Your copyright notice
    // Description : Hello World in C++, Ansi-style
    //============================================================================
    
    #include <iostream>
    using namespace std;
    
    
    void  decrement(int &n) {
        n=n-1;
    }
    
    int main() {
        int a = 5;
        decrement(a);
        cout << a << endl;
    }