cmath库

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/******************************************************************************
cmath Library
*******************************************************************************/
#include <iostream>
#include <cmath>
using namespace std;

int main(){
    cout<<"abs(-8)="<<abs(-8)<<endl;
    cout<<"ceil(3.14)="<<ceil(3.14)<<endl;
    cout<<"floor(3.14)="<<floor(3.14)<<endl;
    cout<<"4^3="<<pow(4,3)<<endl;
    cout<<"sqrt(9)="<<sqrt(9)<<endl;
    
}