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 | #include <iostream> ; #include <fstream>; #include <string> ; #include <iomanip> ; using namespace std ; int main ( ) { string name; int m1 ,m2, m3; float avg; ofstream outfile("mark.txt") ; cout<<"Write your name :"; cin>>name; cout<<"input 3 marks:"; cin>>m1>>m2>m3; avg=m1+m2+m3/3.0; cout <<showpoint << fixed << setprecision (2); cout<<"ur average … |