6. Improve the stringToInteger function to convert an entire string of digits to a non- negative integer. For example, "345" should be converted to 345. ● ● 7. Improve your function to handle bad strings, i.e., ones that are not all digits. Start by declaring a constant of type int named INVALID_COORDINATE and give it a value of -1. Make it a global constant by putting it before the main function (and before the function prototype). You will return this constant from stringToInteger as an error value whenever the input string is bad. ● Hint: Use a loop to process the characters sequentially. Hint: You can use the .length () function to determine how many characters are in a string variable. A somewhat irrelevant example is: if(i =. Anything less than '0' or greater than '9' is not a digit. ● Reminder: If a function has a return type, it should always return a value. If the computer ever reaches the end of your function without a return statement, it will return an apparently random value (whatever is handy in memory) instead. This problem causes weird bugs. The easiest way to avoid this problem is make the last line of your function a return statement. 9. Improve your main function so there is at least one test on a bad string.
6. Improve the stringToInteger function to convert an entire string of digits to a non- negative integer. For example, "345" should be converted to 345. ● ● 7. Improve your function to handle bad strings, i.e., ones that are not all digits. Start by declaring a constant of type int named INVALID_COORDINATE and give it a value of -1. Make it a global constant by putting it before the main function (and before the function prototype). You will return this constant from stringToInteger as an error value whenever the input string is bad. ● Hint: Use a loop to process the characters sequentially. Hint: You can use the .length () function to determine how many characters are in a string variable. A somewhat irrelevant example is: if(i =. Anything less than '0' or greater than '9' is not a digit. ● Reminder: If a function has a return type, it should always return a value. If the computer ever reaches the end of your function without a return statement, it will return an apparently random value (whatever is handy in memory) instead. This problem causes weird bugs. The easiest way to avoid this problem is make the last line of your function a return statement. 9. Improve your main function so there is at least one test on a bad string.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:6. Improve the stringToInteger function to convert an entire string of digits to a non-
negative integer. For example, "345" should be converted to 345.
Hint: Use a loop to process the characters sequentially.
Hint: You can use the length () function to determine how many characters are in a
string variable. A somewhat irrelevant example is:
if(i <str.length())
●
●
7. Improve your function to handle bad strings, i.e., ones that are not all digits. Start by declaring a
constant of type int named INVALID_COORDINATE and give it a value of -1. Make it a
global constant by putting it before the main function (and before the function prototype). You
will return this constant from stringToInteger as an error value whenever the input string
is bad.
●
8. Change the stringToInteger function to return INVALID_COORDINATE if the string has
a length of 0. Also return INVALID_COORDINATE if any character in the string is not a digit.
Hint: You can use a FOR loop to access the characters in a string one by one.
Hint: You can compare characters with comparison operators such as < and >=.
Anything less than '0' or greater than '9' is not a digit.
●
Reminder: If a function has a return type, it should always return a value. If the
computer ever reaches the end of your function without a return statement, it will
return an apparently random value (whatever is handy in memory) instead. This
problem causes weird bugs. The easiest way to avoid this problem is make the last line
of your function a return statement.
●
9. Improve your main function so there is at least one test on a bad string.
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