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  1. #include <stdio.h>
  2.  
  3. void buildingCarbonFootprint(void)
  4. {
  5.     double electricity;
  6.     double gas;
  7.     double footprint;
  8.  
  9.     printf("\nBuilding carbon footprint\n");
  10.  
  11.     printf("Enter electricity consumption in kWh: ");
  12.     scanf("%lf", &electricity);
  13.  
  14.     printf("Enter gas consumption in units: ");
  15.     scanf("%lf", &gas);
  16.  
  17.     footprint =
  18.         electricity * 0.45 +
  19.         gas * 2.2;
  20.  
  21.     printf("The building carbon footprint is %.2f kg CO2\n",
  22.            footprint);
  23. }
  24.  
  25. void carCarbonFootprint(void)
  26. {
  27.     double distance;
  28.     double fuelConsumption;
  29.     double footprint;
  30.  
  31.     printf("\nCar carbon footprint\n");
  32.  
  33.     printf("Enter distance traveled in kilometers: ");
  34.     scanf("%lf", &distance);
  35.  
  36.     printf("Enter fuel consumption in liters: ");
  37.     scanf("%lf", &fuelConsumption);
  38.  
  39.     footprint = fuelConsumption * 2.31;
  40.  
  41.     printf("The car carbon footprint is %.2f kg CO2\n",
  42.            footprint);
  43.  
  44.     printf("Distance traveled = %.2f km\n",
  45.            distance);
  46. }
  47.  
  48. void bicycleCarbonFootprint(void)
  49. {
  50.     double distance;
  51.     double footprint;
  52.  
  53.     printf("\nBicycle carbon footprint\n");
  54.  
  55.     printf("Enter distance traveled in kilometers: ");
  56.     scanf("%lf", &distance);
  57.  
  58.     /*
  59.        The bicycle itself does not directly burn fuel,
  60.        so its direct carbon footprint is considered zero.
  61.     */
  62.  
  63.     footprint = 0;
  64.  
  65.     printf("The bicycle carbon footprint is %.2f kg CO2\n",
  66.            footprint);
  67.  
  68.     printf("Distance traveled = %.2f km\n",
  69.            distance);
  70. }
  71.  
  72. int main(void)
  73. {
  74.     void (*carbonFootprints[3])(void) =
  75.     {
  76.         buildingCarbonFootprint,
  77.         carCarbonFootprint,
  78.         bicycleCarbonFootprint
  79.     };
  80.  
  81.     int choice;
  82.  
  83.     printf("Enter 0 to calculate building carbon footprint\n");
  84.     printf("Enter 1 to calculate car carbon footprint\n");
  85.     printf("Enter 2 to calculate bicycle carbon footprint\n");
  86.  
  87.     scanf("%d", &choice);
  88.  
  89.     if (choice < 0 || choice > 2)
  90.     {
  91.         printf("Invalid choice.\n");
  92.     }
  93.     else
  94.     {
  95.         (*carbonFootprints[choice])();
  96.     }
  97.  
  98.     return 0;
  99. }
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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Enter 0 to calculate building carbon footprint
Enter 1 to calculate car carbon footprint
Enter 2 to calculate bicycle carbon footprint

Building carbon footprint
Enter electricity consumption in kWh: Enter gas consumption in units: The building carbon footprint is 0.00 kg CO2
https://ideone.com/9QikZW
language:
C (gcc 8.3)
created:
3 hours ago
visibility:
public

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