12. 13. Write a program that prompts the capacity, in gallons, of an automobile fuel tank...

12)

C++ program :-

#include <iostream>

using namespace std;

int main() {
int capacity;
int miles_p_gallon;
  
cout<<"Enter the capacity in gallons :"<<endl;
cin>>capacity;
  
cout<<"Enter miles per gallons :"<<endl;
cin>>miles_p_gallon;
  
double no_of_miles;
  
no_of_miles = (double)capacity/(double)miles_p_gallon;
  
cout<<"The no. of miles the vehicle can drive without refueling : "<<no_of_miles<<endl;
}

Output :-

13)

C++ program :-

#include <iostream>

using namespace std;

int main() {
int user_seconds;
int miles_p_gallon;
  
cout<<"Enter the elapsed seconds time :"<<endl;
cin>>user_seconds;
  
int seconds;
int minutes;
int hours;
  
seconds = user_seconds%60;
minutes = user_seconds/60;
hours= minutes/60;
minutes=minutes%60;
  
cout<<"The time : "<<hours<<":"<<minutes<<":"<<seconds<<endl;
}

Output :-