C語(yǔ)言課后練習(xí)題答案第五章.doc

作業(yè)四：簡(jiǎn)單程序設(shè)計(jì)1printf函數(shù)中用到格式符%5s，其中數(shù)字5表示輸出的字符串占用5列。如果字符串長(zhǎng)度大于5，則輸出按方式（B）；如果字符串長(zhǎng)度小于5，則輸出按方式（C）。（5分）(重要)A) 從左起輸出該字符串，右補(bǔ)空格B) 按原字符長(zhǎng)從左向右全部輸出C) 右對(duì)齊輸出該字符串，左補(bǔ)空格D) 輸出錯(cuò)誤信息2 閱讀以下程序，當(dāng)輸入數(shù)據(jù)的形式為：25，13，10（注：表示回車），則正確的輸出結(jié)果為（D）。（5分）main() int x,y,z; scanf(“%d%d%d”,&x,&y,&z);要和這里一樣 printf(“x+y+z=%dn”,x+y+z);A) x+y+z=48 B) x+y+z=35 C) x+z=35 D) 不確定值3 根據(jù)下面的程序及數(shù)據(jù)的輸入和輸出形式，程序中輸入數(shù)據(jù)的正確形式應(yīng)該為（WXY）。（5分）main() char ch1,ch2,ch3; scanf(“%c%c%c”,&ch1,&ch2,&ch3); printf(“%c%c%c”,ch1,ch2,ch3);4以下的輸出結(jié)果是（x=1,y=2*sum*=310 Squard is : 100）。（5分）main() int x=1,y=2; printf(“x=%d y=%d * sum * =%dn”,x,y,x+y); printf(“10 Squared is : %dn”,10*10);5若a=3,b=4,c=5,x=1.2,y=2.4,z=-3.6,u=51274,n=128765,c1=a,c2=b,想得到以下的輸出格式和結(jié)果,請(qǐng)寫出程序(包括定義變量類型和設(shè)計(jì)輸出)。要求輸出的結(jié)果如下:（20分）a= 3 b= 4 c= 5x=1.200000,y=2.400000,z=-3.600000x+y= 3.6 y+z=-1.20 z+x=-2.40u= 51274 n= 128765c1=a or 97(ascll)c2=b or 98(ascll)main() int a=3,b=4,c=5;float x=1.2,y=2.4,z=-3.6;unsigned u=51274;long n=128765;char c1=a,c2=b;printf(“a=%d b=%d c=%dn”,a,b,c);printf(“x=%f ,y=%f, z=%fn”,x,y,z);printf(“x+y=%3.1f y+z=%.2f z+x=%.2fn”,x+y,y+z,z+x);printf(“u=%u n=%9ld n”,u,n);printf(“c1=%cor %d (asc11) n”,c1,c1);printf(“c2=%cor %d (asc11) n”,c2,c2);6請(qǐng)寫出下面程序的輸出結(jié)果。（20分）main() int a=5,b=7;flat x=67.8564,y=-789.124;char c=A;long n=1234567;unsigned u=65535;printf(%d%dn,a,b);printf(%3d%3dn,a,b);printf(%-10f,%-10fn,x,y);printf(%f,%fn,x,y);printf(%8.2f,%8.2f,%4f,%4f,%3f,%3fn,x,y,x,y,x,y);printf(%e,%10.2en,x,y);printf(%c,%d,%o,%xn,c,c,c,c);printf(%u,%o,%x,%d,u,u,u,u);printf(%s,%5.3sn ,COMPUTER,COMPUTER);57 5 767.856400_,-789.12400067.856400,-789.124000_67.86, _-789.12, 67.856400,-789.124000, 67.856400,-789.1240006.785400e1, _-7.89e2A,65,101,4165535,177777,ffff,-1,COMPUTER, _COM7用下面的scanf函數(shù)輸入數(shù)據(jù),使a=3,b=7,x=0.5,y=71.82,c1=A,c2=a,問(wèn)在鍵盤上如何輸入?（10分）Main()int a,b;float x,y;char c1,c2;scanf(a=%d b=%d,&a,&b);scanf(%f %e,&x,&y);scanf( %c %c,&c1,&c2);printf(a=%d,b%d,x=%f,y=%f,c1=%d,c2=%cn,a,b,x,y,c1,c2;a=3_b=7_0.5_7.182e1Aa8用下面的scanf函數(shù)輸入數(shù)據(jù),使a=10,b=20,c1=A,c2=a,x=1.5,y=-3,75,z=67.8,問(wèn)在鍵盤上如何輸入數(shù)據(jù)?（10分）Scanf(%5d%d%c%c%f%f*f,%f,&a,&b,&c1,&c2,&x,&y,&z);解:main() int a,b;float x,y,z; char c1,c2; scanf(%5d%5d%c%c%f%f*f,%f,&a,&b,&c1.&c2,&x,&y,&z); printf(a=%d,b=%d,c1=5c,c2=%c,x=%6,.2f,y=6.2f,z=6.2fn),a,b,c1,c2,x.,y,z);10_20Aa1.5_-3.75*f,67.89設(shè)圓的半徑R=1.5,圓柱高H=3,求圓周長(zhǎng).面積.球表面積.球體積.圓柱體積.用scanf輸入數(shù)據(jù),輸入數(shù)據(jù),輸出計(jì)算結(jié)果,輸出時(shí)要求文字說(shuō)明,取小數(shù)點(diǎn)后2位數(shù)字.請(qǐng)編程序。（20分）#define Pi 3.14159#include”stdio.h”main() float l,s, qs,qv ,ys,r,h;Scanf(:%f,%f”,&r,&h);l=2*