main. c swap c 1. /main. c * swap c void swapO 123 extern int bufa: 23456789 nt buf[2]={1,2} 4. int bufpo &buf[o] 5. int "bufp1 Int maino 6 7. void swapO swapo eturn o If temp 10.} 10. 11 bufp1 =&buf[1] 12 remp =*bufo 13 bufo = bufp1 14 bufpl temp Figure 7.1 P5413 main.c swap.c 1. /*main.c */ 2. void swap() ; 3. 4. int buf[2] = {1, 2}; 5. 6. Int main() 7. { 8. swap() ; 9. return 0 ; 10. } 1. /*swap.c */ 2. extern int buf[]; 3. 4. int *bufp0 = &buf[0] 5. int *bufp1 ; 6. 7. void swap() 8. { 9. int temp ; 10. 11. bufp1 = &buf[1]; 12. temp = *bufp0 ; 13. *bufp0 = *bufp1 ; 14. *bufp1 = temp ; 15. } Figure 7.1 P541