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5.8 The do-while Statement and H FIGURE 5.14 Validating Input Using do-while Statement 1. /* Returns the first integer between n_min and n_max en * Pre : n_min <= n_max 4. * Post: Result is in the range n_min through n_max. 2. 3.

5.8 The do-while Statement and H FIGURE 5.14 Validating Input Using do-while Statement 1. /* Returns the first integer between n_min and n_max en * Pre : n_min <= n_max 4. * Post: Result is in the range n_min through n_max. 2. 3.

C++ for Engineers and Scientists
C++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter2: Problem Solving Using C++using
Section2.3: Data Types
Problem 9E: (Practice) Although the total number of bytes varies from computer to computer, memory sizes of...
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If we wanted to rewrite the code on page 275 to use while loops instead of do-while loops, what would we have to do differently? Explain.

275 5.8 • The do-while Statement and Flag-Controlled Loops FIGURE 5.14 Validating Input Using do-while Statement 1. /* Returns the first integer between n min and n max entered as data. Pre : n_min <= n_max 2. 3. 4. Post: Result is in the range n min through n_max. * / 5. 6. int 7. get _int (int n_min, int n_max) 8. { 9. int in_val, /* input - number entered by user * / 10. /* status value returned by scanf * / status; 11. char skip_ch; /* character to skip * / 12. int /* error flag for bad input * / error; 13. /* Get data from user until in val is in the range. * / 14. do { 15. /* No errors detected yet. */ 16. error = 0; 17. /* Get a number from the user. */ 18. printf("Enter an integer in the range from %d ", n_min); 19. printf("to %d inclusive> ", n_max); 20. status = scanf("%d", &in_val); 21. 22. /* Validate the number. */ 23. if (status != 1) { /* in_val didn't get a number */ 24. error = 1; scanf("%c", &skip_ch); printf("Invalid character >>%c>>. ", skip_ch); printf("Skipping rest of line.\n"); } else if (in_val < n_min || in_val > n_max) { 25. 26. 27. 28. 29. error = 1; 30. printf("Number %d is not in range.\n", in_val) ; 31. 32. /* Skip rest of data line. */ 33. do 34. scanf ("%c", &skip_ch); while (skip_ch != '\n'); 35. 36. } while (error); 37. 38. return (in_val); 39. 40. } 12.
Transcribed Image Text:275 5.8 • The do-while Statement and Flag-Controlled Loops FIGURE 5.14 Validating Input Using do-while Statement 1. /* Returns the first integer between n min and n max entered as data. Pre : n_min <= n_max 2. 3. 4. Post: Result is in the range n min through n_max. * / 5. 6. int 7. get _int (int n_min, int n_max) 8. { 9. int in_val, /* input - number entered by user * / 10. /* status value returned by scanf * / status; 11. char skip_ch; /* character to skip * / 12. int /* error flag for bad input * / error; 13. /* Get data from user until in val is in the range. * / 14. do { 15. /* No errors detected yet. */ 16. error = 0; 17. /* Get a number from the user. */ 18. printf("Enter an integer in the range from %d ", n_min); 19. printf("to %d inclusive> ", n_max); 20. status = scanf("%d", &in_val); 21. 22. /* Validate the number. */ 23. if (status != 1) { /* in_val didn't get a number */ 24. error = 1; scanf("%c", &skip_ch); printf("Invalid character >>%c>>. ", skip_ch); printf("Skipping rest of line.\n"); } else if (in_val < n_min || in_val > n_max) { 25. 26. 27. 28. 29. error = 1; 30. printf("Number %d is not in range.\n", in_val) ; 31. 32. /* Skip rest of data line. */ 33. do 34. scanf ("%c", &skip_ch); while (skip_ch != '\n'); 35. 36. } while (error); 37. 38. return (in_val); 39. 40. } 12.
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