《C++语言程序设计》综合练习与期末复习题(3)

i++;}

cout<

(3) #include

main()

{int a[9]={2,4,6,8,10,12,14,16,18}; for(i=0;i<9;i++)

{ cout<

if((i+1)%3= =0) cout<

}

}

(4) #include

void LE(int *a,int *b){ int x=*a;

*a= *b; *b=x;

cout<<*a<

void main()

{int x=10,y=25;

LE(&x,&y);

cout<

}

(5) #include \

class A{ int a,b; public:

A(){a=b=0;} A(int aa,int bb){ a=aa; b=bb;

cout<

void main()

{A x,y(2,3),z(4,5); }

(6) #include \

temple class FF{

TT a1,a2,a3;

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public:

FF(TT b1,TT b2,TT b3){ a1=b1;a2=b2;a3=b3; }

TT sum(){return a1+a2+a3;} ];

void main()

{FF x(2,3,4),y(5,7,9);

cout<

}

(7) #include \

void SB(char ch){ switch(ch){

case ? a?:case ?A ?: cout<<”well!”;break; case ? b?:case ?B ?: cout<<”good!”;break; case ? c?:case ?C ?: cout<<”pass!”;break; default: cout<<”bad!”;break; void main()

{char a1=?b?,a2=?C?,a3=?f?; SB(a1);SB(a2);SB(a3);SB(?A?); cout<

}

若main()函数改为：

void main()

{char a[6]=”Abcaf”;

for(int i=0;a[i];i++) SB(a[i]);

}

(8) #include

#include void main() {char

*a[5]={“student”,”worker”,”cader”,”solider”,”peasant”};

char p1,p2; p1=p2=a[0];

for(int i=0;i<5;i++)

{ if(strcmp(a[i],p1)>0) p1=a[i]; if(strcmp(a[i],p2)<0) p2=a[i]; }

cout<

12

(9) #include \

int a=5; void main()

{int a=10,b=20;

cout<,a<

for(int i=1;i<6;i++) { a+=i;b+=a;}

cout<

cout<

(10) #include \

int LB(int *a,int n){ int s=1;

for(int i=0;i

return s;

}

void main()

{int a[]={1,2,3,4,5,6,7,8}; int b=LB(a,5)+LB(&a[3],3); cout<<”b=”<

(11) #include < iostream.h>

#include struct Worker{ char name[15];

int age; float pay; };

void main() {Worker x;

char *t=”liouting”; int d=38; f=493; strcpy(x.name,t) x.age=d;x.pay=f;

cout<

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(12) #include \ class A{

int a;

public:

A(int aa=0){a=aa;}

~A(){cout<<”Destructor A!”<

};

class B:public A{

int b;

public:

B(int aa=0,int bb=0):A(aa){b=bb;}

~B(){cout<<”Destructor B!”<

void main()

{B x(5),y(6,7); }

(13) #include

#include

double SD(int a,int b,char op){ double x;

switch(op){

case ?+?:x=double(a )+b;break;

case ?-?:x=double( a)-b;break; case ?*?:x=double(a)*b;break; case ?/?:if(b)x=double(a)/b;break; else exit(1); default:exit(1); } return x; } void main() {int x=25,y=8;

cout<

}

(14) #include

void main()

{int a[8]={36,25,48,14,55,40,32,66}; int b1,b2;

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b1=b2=a[0];

for(i=1;i<8;i++) { if(a[i]>b1){

if(b1>b2) b2=b1; b1=a[i];

}

cout<

若将>全改成<,结果如何？ (15) #include

void WF(int x,int y){ x=x+y; y=x+y;

cout<<”sub:”<<”x,y=”<

void main() {int x=8,y=15;

cout<<”main:”<<”x,y=”<

cout<<”main:”<<”x,y=”<

cout<<”main:”<<”x,y=”<

}

(16) #include

void LC(int a,int b){

int x=a; a=b; b=x;

cout<

void main()

{int x=10,y=25;

LC(x,y); cout<

}

若将LC的形参表改为：LC(int &a,int &b)则结果如何？(17) #include

#include struct Worker{ char name[15];

int age; float pay;

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