EXHIBIT 11 CACI INTERNATIONAL INC AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE Three Months Ended Nine Months Ended March 31, March 31, 1998 1997 1998 1997 ------- ------- ------- ------- Net income $ 3,106 $ 2,979 $ 8,410 $ 8,523 ======= ======= ======= ======= Average shares outstanding during the period 10,813 10,633 10,758 10,445 Dilutive effect of stock options after application of treasury stock method 386 442 376 536 ------- ------- ------- ------- Average number of shares outstanding during the period 11,199 11,075 11,134 10,981 ======= ======= ======= ======= Basic earnings per share $ 0.29 $ 0.28 $ 0.78 $ 0.82 ======= ======= ======= ======= Diluted earnings per share $ 0.28 $ 0.27 $ 0.76 $ 0.78 ======= ======= ======= =======