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  1. /* Program will calculate the average cost of groceries */
  2. /* User will be prompted for number of weeks and grocery bill per week */
  3.  
  4. #include <stdio.h>
  5.  
  6. int main(void) 
  7. {
  8.  
  9. /* Declare variables */
  10. int count, maxweek, weekNum;
  11. float grocerybill, sum, avg;
  12.  
  13. /*Initialize value */
  14. count = 0; 
  15. maxweek = 0;
  16. sum = 0;
  17. avg = 0;
  18. weekNum = 0;
  19.  
  20. //Ask user for the number of weeks to calculate
  21. printf("How many weeks do you want to calculate? \n");
  22. scanf("%d", &maxweek);
  23.  
  24. //Display number of weeks
  25. printf("You've requested %d weeks\n", maxweek);
  26.  
  27. //Loop through maxweeks of groceries
  28. while (count<maxweek) 
  29. 	{
  30. 	printf("Enter grocery bill for week# : \n", weekNum);
  31. 	scanf("%f", &grocerybill);
  32. 	//printf("\nfood", grocerybill);
  33.  
  34. 		if (grocerybill >=0) {
  35. 			sum = sum + grocerybill;
  36. 			count = count + 1;
  37. 			weekNum = weekNum + 1;
  38.  
  39. 		}
  40. 		else {
  41.  
  42. 		printf("Value should be greater or equal to zero\n");
  43. 		}
  44. 	}
  45.  
  46. //Calculate average groceries over maxweeks 
  47. avg = sum / count;
  48.  
  49. //Display average groceries
  50. printf("Average spent in groceries is %.2f\n", avg);
  51.  
  52. 	return 0;
  53. }
Success #stdin #stdout 0s 9432KB
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stdin
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stdout
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How many weeks do you want to calculate? 
You've requested 4 weeks
Enter grocery bill for week# : 
Enter grocery bill for week# : 
Enter grocery bill for week# : 
Enter grocery bill for week# : 
Average spent in groceries is 150.00
https://ideone.com/dlHxY7
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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