Question

write a program in c ++ that reads the length and width of a rectangle from a file named input.txt and write the area and perimeter of the rectactangle to file named output.txt

Answer 1

#include<bits/stdc++.h>

using namespace std;

int main()

{

ifstream infile;

infile.open("input.txt");

string x,y;

infile>>x;

infile>>y;

stringstream SS_1(x),SS_2(y);

int l=0,b=0;

SS_1 >>l;

SS_2 >>b;

int area = l*b,perimeter=2 * (l+b);

ofstream outfile;

outfile.open("output.txt");

outfile<<area<<endl<<perimeter;

}

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