In programming, a common task is to swap the values of two variables. Lines 40-60 of the program below perform the swap using a temporary variable (T).

10 A=123
20 B=456
30 PRINT A,B
40 T=A
50 A=B
60 B=T
70 PRINT A,B

Rewrite the program to swap the values in A and B without using a temporary variable.

Note: The new program will not require sophisticated programming or complex math.

CLS
A=123
B=456
PRINT a,b
A=A+B
B=A-B
A=A-B
PRINT A,B
END
Edited on January 2, 2004, 3:47 pm

Posted by rerun141 on 2004-01-02 14:48:46