Question

Can someone convert this code to use printf & scanf instead of cin and cout

#include <iostream>

int main()
{
   int n, i = 0;
   float RF, PFD, Tn = 0, Ts;
   std::cout << "**** Welcome to the Time Study Program ****" << std::endl;
   std::cout << "\nEnter the number of elements for the given operation being performed" << std::endl;
   std::cout << "Number of Elements: ";
   std::cin >> n;
   if (n < 0)
   {
       std::cout << "\nNumber of elements cannot be negative! Try again.";
       return 0;
   }

   std::cout << "\nEnter the Performance Rating (PR) factor as a percentage" << std::endl;
   std::cout << "RF: ";
   std::cin >> RF;
   if (RF < 0)
   {
       std::cout << "\nPercentage cannot be negative! Try again.";
       return 0;
   }
   RF = RF / 100.0;

   std::cout << "\nEnter the Personal Fatigue Delay (PFD) value as a percentage" << std::endl;
   std::cout << "PFD: ";
   std::cin >> PFD;
   if (PFD < 0)
   {
       std::cout << "\nPercentage cannot be negative! Try again.";
       return 0;
   }
   PFD = PFD / 100.0;

   std::cout << "\nNow enter the measured cycle times in hundredths of a minute for each element" << std::endl;
   std::cout << "(Note: Time entered should be relative not absolute)\n";

   float ET[n], temp[n];
   while (i < n)
   {
       std::cout << "\n Element " << i + 1 << ": ";
       std::cin >> ET[i];

       if (ET[i] < 0)
       {
           std::cout << "\nTime cannot be negative! Try Again.";
           return 0;
       }
       i++;
   }

   /*
   temp[] array stores the one hundredths of minutes of corresponding elements
   */

   i = 0;
   while (i < n)
   {
       if (i == 0)
           temp[i] = ET[i] / 100;
       else
           temp[i] = (ET[i] - ET[i - 1]) / 100;
       i++;
   }

   i = 0;
   while (i < n)
   {
       Tn = Tn + temp[i];
       i++;
   }

   Tn = Tn * RF;
   Ts = Tn * (1 + PFD);

   std::cout << "\n**** Time Study Results ****";
   std::cout << "\nThe Time Standard is: Ts = " << Ts << " minutes";
   return 0;
}

Answer 1

Program rewritten with printf:

#include <iostream>

int main()
{
   int n, i = 0;
   float RF, PFD, Tn = 0, Ts;
   printf("**** Welcome to the Time Study Program ****\n");
   printf("Enter the number of elements for the given operation being performed\n");
   printf("Number of Elements: ");
   scanf("%d",&n);
   if (n < 0)
   {
       printf("\nNumber of elements cannot be negative! Try again.\n");
       return 0;
   }

   printf("Enter the Performance Rating (PR) factor as a percentage\n");
   printf("RF: ");
   scanf("%f",&RF);
   if (RF < 0)
   {
       printf("\nPercentage cannot be negative! Try again.");
       return 0;
   }
   RF = RF / 100.0;

   printf("\nEnter the Personal Fatigue Delay (PFD) value as a percentage\n");
   printf("PFD: ");
   scanf("%f",&PFD);
   if (PFD < 0)
   {
       printf("\nPercentage cannot be negative! Try again.");
       return 0;
   }
   PFD = PFD / 100.0;

   printf("\nNow enter the measured cycle times in hundredths of a minute for each element\n");
   printf("(Note: Time entered should be relative not absolute)\n");

   float ET[n], temp[n];
   while (i < n)
   {
       printf("\n Element %d: ",i + 1);
       scanf("%f",&ET[i]);

       if (ET[i] < 0)
       {
           printf("\nTime cannot be negative! Try Again.");
           return 0;
       }
       i++;
   }

   /*
   temp[] array stores the one hundredths of minutes of corresponding elements
   */

   i = 0;
   while (i < n)
   {
       if (i == 0)
           temp[i] = ET[i] / 100;
       else
           temp[i] = (ET[i] - ET[i - 1]) / 100;
       i++;
   }

   i = 0;
   while (i < n)
   {
       Tn = Tn + temp[i];
       i++;
   }

   Tn = Tn * RF;
   Ts = Tn * (1 + PFD);

   printf("\n**** Time Study Results ****");
   printf("\nThe Time Standard is: Ts = %f minutes",Ts);
   return 0;
}

Output for your reference: