C語(yǔ)言程序設(shè)計(jì)：數(shù)據(jù)的輸入與輸出單元測(cè)試與答案

一、單選題1printf("a\rHappi\by")A.HappyB.aHappiC.aHappyD.Happi正確答案：A2、以下程序的輸出結(jié)果是（intmain(){floatinti;i=(int)x;printf("x=%f,i=%d\n",x,i);return0;}A.x=3.600000,i=3B.x=3.600000,i=4C.x=3i=3.600000D.x=3,i=3正確答案：A3、已定義doublea;int選擇正確的輸入格式為（ ）。A.scanf("%6lf%3d",&a,&i);B.scanf("%6.2f%3d",&a,&i);C.scanf("%lf%s",&a,&i);D.scanf("%f%d",a,i);正確答案：A4、已有定義chars1,s2;，下面正確的語(yǔ)句是（ A.scanf("%s%c",s1,&s2);B.scanf("%c%c",s1,s2);C.scanf("%s%c",s1,s2);D.scanf("%c%c",&s1,&s2);正確答案：D5、運(yùn)行下面的程序，正確的輸出結(jié)果是（#include<stdio.h>intmain(){doublex=68.7563,y=-789.127;printf("%f,%10.2f\n",x,y);return0;}A.68.756300,□□□-789.13B.68.75,□□□-789.13C.68.75,-789.12D.68.756300,□□□-789.12A6、已知float段是（。x=2.230000,y=4.350000y+x=6.58,y-x=2.12A.printf("x=%8.6f,y=%8.6f\n",x,y);printf("y+x=%4.2f,y-x=%4.2f\n",y+x,y-x);B.printf("x=%8.2f,y=%8.2f",x,y);printf("y+x=%4.2f,y-x=%4.2f\n",y+x,y-x);C.printf("x=%7.2f,y=%7.2f\n",x,y);printf("y+x=%3.2f,y=%3.2f\n",y+x,y-x);D.printf("x=%f,y=%f\n",&x,&y);printf("y+x=%f,y=%f\n",y+x,y-x);二、判斷題1、C函數(shù)完成。正確答案：√2正確答案：×3ASCIIASCII數(shù)通用。正確答案：√4、程序的順序結(jié)構(gòu)是指按照解決問題的順序?qū)懗鱿鄳?yīng)的語(yǔ)句，程序執(zhí)行順序按照自上而下，依次按順序執(zhí)行。正確答案：√三、填空題1、下列語(yǔ)句輸出的結(jié)果charch='b';printf("%c,%d",ch,ch);正確答案：b,982scanfa=2,b='x',c='z'#include<stdio.h>intmain(){inta,b;scanf("%d%c",&a,&bprintf(" return0;}正確答案：a=%d,b='%c',c='%c'3、下面程序的運(yùn)行結(jié)果是：

。#include<stdio.h>intmain(){charstr=65;printf("str=%c,ASCII=%d",str,str);return0;}正確答案：st