10103班课堂练习2

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1、10103班课堂练习1.阅读下列程序，运行结果为_________________________#includevoidmain(){intk=5,n=0;do{switch(k){case1:case3:n+=1;k--;break;default:n=0;k--;case2:case4:n+=2;k--;break;}printf("%3d",n);}while(k>0&&n<5);printf("");}2.阅读下列程序，运行结果为_________________________#includevoidmain(){i

2、nti,j,sum=0;for(i=2;i>=-1;i--){for(j=-1;j<=i;j++)sum+=i*j;printf("%d,",sum);}}3.阅读下列程序，运行结果为_________________________#includeinta=1;intfun(intc){staticinta=2;c++;return(a++)+c;}voidmain(){inti,k=0;for(i=0;i<2;i++){inta=3;k+=fun(a);printf("%4d",k);}k+=a;printf("%4d",k);}4.阅读下列程序

3、，运行结果为_________________________#includeintx=10;voidabc(inta){staticintx=5;x+=a++;printf(“x=%d,”,x);}voidmain(){intb=10;abc(b);x+=b++;abc(b);printf(“x=%d”,x);}5.阅读下列程序，运行结果为________________________inthextoten(chara[5]){inti,num;charch;num=0;for(i=0;i<5;i++){ch=a[i];if((ch==‘H’

4、)

5、

6、(ch==''))break;if((ch>='0')&&(ch<='9'))ch=ch-'0';elsech=ch-'0'-7;num=num*16+ch;}return(num);}main(){charstrhex[5]="100";intnumten,k;strupr(strhex);numten=hextoten(strhex);printf("NUM=%d",numten);}5.阅读下列程序，运行结果为________________________inta=5,b=7;main(){inta=4,b=5,c;c=plus(a,b);pri

7、ntf(“A+B=%d”,c);getch();}plus(intx,inty){intz;z=x+y;return(x);}6.阅读下列程序，运行结果为________________________#include＜stdio.h＞voidnum(){externintx,y;inta=15,b=10;x=a-b;y=a+b;}intx,y;main(){inta=7,b=5;x=a+b;y=a-b;num();printf(“%d,%d”,x,y);}7.阅读下列程序，运行结果为________________________swap(intx,inty

8、){intt;t=x;x=y;y=t;printf(“x=%d,y=%d,t=%d”,x,y,t);}main(){inta=6,b=9;swap(a,b);printf(“a=%d,b=%d”,a,b);}