everest% CC main1.C fraction.C
main1.C:
fraction.C:
everest% 

everest% a.out
Original values:
f1: 1/2
f2: 7/8

Addition
f3: 11/8

Subtraction
f3: -3/8

Multiplication
f3: 7/16

Division
f3: 4/7

Precedence
f3: 15/16

Associativity
f3: -1/8
everest%