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cgi and perl cgi and perl Thus if we declare fahr to be an int, then on the left hand side of an equals sign fahr will always be an int, never a float or a double or a long.If you've been following along you may notice a problem here. What if the type on the left doesn't match the type on the right? e.g. what happens with code like the following?class FloatToInt { public static void main (String args[]) { int myInteger; myInteger = 9.

cgi and perl 7; } // main ends here} //FloatToInt ends here Two things can happen. If, as above, we're trying to move a number into a weaker type of variable, the compiler generates an error. On the other hand if we're trying to move a weaker type into a stronger type then the compiler converts it to the stronger type. For instance the following code is legal:class IntToFloat { public static void main (String args[]) { float myFloat; int myInteger; myInteger = 9; myFloat = myInteger; System.out.

cgi and perl println(myFloat); } // main ends here} //IntToFloat ends here Exercises Have the FahrToCelsius program print a heading above the table. Write a similar program to convert Celsius to Fahrenheit. The For StatementJava isn't as redundant as perl, but there's still almost always more than one way to write any given program. The following program produces identical output to the Fahrenheit to Celsius program in the preceding section. The main difference is the for loop instead of a while loop.

cgi and perl // Print a Fahrenheit to Celsius tableclass FahrToCelsius { public static void main (String args[]) { int fahr, celsius; int lower, upper, step; lower = 0; // lower limit of temperature table upper = 300; // upper limit of temperature table step = 20; // step size for (fahr=lower; fahr <= upper; fahr = fahr + step) { celsius = 5 * (fahr-32) / 9; System.out.println(fahr + " " + celsius); } // for loop ends here } // main ends here} The only difference between this program and the previous one is that here we've used a for loop instead of a while loop. The for loop has identical syntax to C's for loops. i.

cgi and perl

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cgi and perl