Find the errors in each of the following code segments and explain how to correct them.

Question

a) ```
x = 1;
while ( x <= 10 );
x++;
}
```
b) ```
for ( y = .1; y != 1.0; y += .1 )
cout << y << endl;
```
c) ```
switch ( n )
{
case 1:
cout << "The number is 1" << endl;
case 2:
cout << "The number is 2" << endl;
break;
default:
cout << "The number is not 1 or 2" << endl;
break;
}
```
d) The following code should print the values 1 to 10.
```
n = 1;
while ( n < 10 )
cout << n++ << endl;
```

Answer 1

a) Error: The semicolon after the while header causes an infinite loop.
Correction: Replace the semicolon by a {, or remove both the ; and the }.
b) Error: Using a floating-point number to control a for repetition statement.
Correction: Use an int and perform the proper calculation to get the values you desire.
c) Error: Missing break statement in the first case.
Correction: Add a break statement at the end of the first case. This is not an error if you want the statement of case 2: to execute every time the case 1: statement executes.
d) Error: Improper relational operator used in the loop-continuation condition.
Correction: Use <= rather than <, or change 10 to 11.