《程序设计》期末试卷和答案 - B.docxVIP

《The C Programming Language》 EXAMINATION?PAPER Semester: __ Spring _ Year: __2016_ BEIJING JIAOTONG UNIVERSITY Department: _School of Economics and Management _ Class No: __2015_Class 1,2,3 _ Student Name: ___ _____ Student ID: ___ _____ Important?note:?your?answers?must?be?written?on?the?answer?sheet? ?? Section?1:?Fill?in?the?blanks（2?mark?for?each?item,?total?30?marks）? The?value?of?expression?321?is?_ 0____. The value of expression (double)(10/4) is__ 2.000000（2）___. What value is stored into the int variable b in each of the following? Assume that b and n are int variables with b containing 12 and n containing 5. b%=(n%=2) b=_______0_____________. The?output?of?the?following?statements?is?___ k=1 s=30__. int?k=1,?s=0; ?switch?(k)?{? ??????case?1:?s+=10;?? ??????case?2:?s+=20;?break;??????? default:?s+=3;?? }? printf(k=%d?s=%d,?k,?s);? The?following?program?fragment?prints?out?__4___.? int?i;? int?f(int?x)? {?static?int?k?=?0;? x+=k++;? return?x;?}? main( ) {i=f(2);? i=f(3);? printf(“%d”,i);?} For the following recursive function f，function call f(2, 3, 2, 1); will output__313212_____. void f(int n, char a, char b, char c) { if(n == 1) printf(%c%c, a, b); else{ f(n-1, a, c, b); printf(%c%c, a, b); f(n-1, c, b, a); } return; } The?following?program?prints?out?__5___.? #include?stdio.h #include?string.h? main()? {?char?st[20]=”hello\0world!”;? printf(“%d\n”,strlen(st));?} The following code fragment will output __0___. static int x, y, z; z = (x=1) || (y=2); printf(%d , y); The following code fragment will output __##___. main()?? {??int?x;? for?(x=1;?x10;?x++)? ?{?if??(x3)??continue;? x*=2; printf(“#”);?}? ?} The following code fragment will output __10___.? main()? {?int?array?[]?=?{2,?8,?3,?11,?13,?2,?8,?2};??int?k;???int?total?=?0;? ? for?(?k?=?0;?k??8;?k++?)? {???if?(?array?[k]?%?2)?break;??? total?+=?array?[k];??}?? printf?(?“%d?”,?total?);?} Section?2:?Single?Choice（2?mark?for?each?item,?total?