《程序设计》期末试卷.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）? According?to?the?declaration:?int?a[3][5]，the?number?of?elements?of?array?a?is?_ ____. 1.3 The?value?of?expression??1105??is?_____. 3.?The?value?of?expression?321?is?_____. 1.?The?value?of?expression?1+4/5+157+4%5+(8,10)?is?______.? 1.6 The?output?of?the?following?statements?is?_____. int?k,?s; for(k=1,?s=0;?k10;?k++) {???if?(k%2==0)?continue;??????s?+=?k;??}? printf(k=%d?s=%d,?k,?s);? 1.8 The?output?of?the?following?statements?is?_____. 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);? 1.9 The?output?of?the?following?program?is?_____. #?include?stdio.h? ????int?f(?)??????????????????????? {???static?int?k;?????????? return?++k;?}? void?main(?)? {??int?k;? ???for(k=0;k3;k++)??????? printf(%d,?f(?));?}? 14.?The?following?program?fragment?prints?out?_____.? int?i;? int?f(int?x)? {?static?int?k?=?0;? x+=k++;? return?x;?}? main( ) {i=f(2);? i=f(3);? printf(“%d”,i);?} 1.10 The?output?of?the?following?program?is?_____. f?(int?x) ?{?if(x=1)?return?1;? else?return?f(x-1)+f(x-2);?}? void?main(?)? {??printf(%d,?f(4));?}? For the following recursive function f，function call f(2, 3, 2, 1); will output_______. 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; } 15.?The?following?program?fragment?prints?out?_____.? int?f(int?x)? {?return?((x0)??x*f(x-1):3);?}? printf(“%d”,f(f(1)));? 5.?The?statement?for?(i=1;?i=9;?i++)?printf(“%3d”,?______); prints?out?the?following?numbers:?1?4?7