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  1. #include <stdio.h>
  2.  
  3. main(){
  4. 	// Init the variables we use
  5. 	int year = 0;
  6. 	int month = 0;
  7. 	int day = 0;
  8. 	int maxDay = 0;
  9. 	int daysToAdd = 0;
  10.  
  11. 	// Ask user for a date
  12. 	printf("Please enter a date in the following format: dd/mm/yyyy:\n");
  13. 	// Validate data
  14. 	while( scanf( "%d/%d/%d", &day, &month, &year)!= 3 || day<=0 || month<=0 || year<0 || daysInMonth(month,year)<day ){
  15. 		printf("Please enter a valid date.\n");
  16. 	}
  17.  
  18. 	// Ask user for days to add
  19. 	printf("Please enter days to add: \n");
  20. 	// Validate data
  21. 	while( scanf( "%d", &daysToAdd)!= 1 || daysToAdd<=0 ){
  22. 		printf("Please enter a positive number.\n");
  23. 	}
  24.  
  25. 	// Calculate date
  26.  
  27. 	day += daysToAdd;
  28. 	maxDay = daysInMonth( month, year);
  29. 	while( day>maxDay ){
  30.  
  31. 		day -= maxDay;
  32. 		month += 1;
  33. 		if(month==13){
  34. 			month = 1;
  35. 			year += 1;
  36. 		}
  37.  
  38. 		maxDay = daysInMonth( month, year);
  39. 	}
  40.  
  41. 	printf("Result date : %d/%d/%d", day, month, year);
  42.  
  43. 	return(0);
  44. }
  45.  
  46. // Get days in the month
  47. int daysInMonth( int month, int year){
  48.     if( month==4 || month==6 || month==9 || month==11 ){
  49. 		return 30;
  50. 	}else if( month== 2 ){
  51. 		if( year%4==0 && ( year%100==0 || year%400==0) )
  52. 			return 29;
  53. 		else
  54. 			return 28;
  55. 	}else{
  56. 		return 31;
  57. 	}
  58. }
  59.  
Success #stdin #stdout 0s 2252KB
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stdin
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8/8/2014
125
stdout
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Please enter a date in the following format: dd/mm/yyyy:
Please enter days to add: 
Result date : 11/12/2014
https://ideone.com/CGXgtP
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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