According to Mapquest: McClure, Illinois and Cape Girardeau (actually in MO) are 7.22 miles apart. I couldn't find McClure on my map but it appears to be in Illinois on the Missouri border.

http://www.mapquest.com/directions/main.adp?cid=aolsrch&go=1&1a=&1c=McClure&1s=IL&1z=&2a=&2c=Cape%20Girardeau&2s=MO