大连理工大学软件学院C语言上机第五六章课后题

五、1.

#includeint main()

{

int a,b,c;

float X,Y,Z;

scanf("%d%d%d",&a,&b,&c);

X=a+b+c;

Y=a*b*c;

Z=X/3;

printf("和=%f\n积=%f\n平均值=%f",X,Y,Z);

}

2.

#includeint main()

{

double d,h,C,S,V,pi;

pi=3.14;

printf("圆柱的底面直径：");

scanf("%lf",&d);

printf("圆柱的高：");

scanf("%lf",&h);

C=d*pi;

S=C*h+d*d*pi/2;

V=S*h;

printf("底面周长：%.2f\n表面积：%.2f\n体积：%.2f\n",C,S,V);

}

3.

#includeint main ()

{double F,C;

printf("华氏温度：");

scanf("%lf",&F);

C=5*(F-32)/9;

printf("摄氏温度：%.4f\n",C);

return 0;

}

4.

#includeint main ()

{

char a;

scanf("%c",&a);

a=a-32;

printf("%c\n",a);

return 0;

}

5.

#includeint main ()

{char A,B,C,D,E;

scanf("%c%c%c%c%c",&A,&B,&C,&D,&E);

A+=4;

B+=4;

C+=4;

D+=4;

E+=4;

printf("%c%c%c%c%c\n",A,B,C,D,E);

return 0;

}

六、

1.

#includeint main ()

{double a,b,s;

scanf("%lf%lf",&a,&b);

s=0.5*a*b;

printf("s=%f\n",s);

return 0;

}

2.

#includeint main ()

{int a,b,c,d,X,Y;

scanf("%d",&X);

a=X/100;

c=X%10;

b=X/10;

d=b%10;

Y=100*c+10*d+a;

printf("%d\n",Y);

return 0;

}

3.

#includedouble max(double a,double b)

{double imax;

if(a>b)

imax=a;

else

imax=b;

return imax;

}

double min(double a,double b)

{double imin;

if(a

7.

#include#includedouble szh(double x,double y,double z)

{double a,b,c,temp,COS;

if(x>y)

{

temp=x;

a=y;

}

else

{ temp=y;

a=x;

}

if(temp>z)

{

c=temp;

b=z;

}

else

{

c=z;

b=temp;

}

COS=(a*a+b*b-c*c)/(2*a*b);

return COS;

}

int main()

{double a,b,c,COS,SIN;

scanf("%lf %lf %lf",&a,&b,&c);

COS=szh(a,b,c);

SIN=sqrt(1-COS*COS);

printf("最大角正弦值：%f\n",SIN);

return 0;

}

10.

#includeint main()

{double a,b,c,d,e,s;

scanf("%lf %lf",&a,&b);

c=1000*b;

d=10800*b;

if(d>100000)

e=d*0.02;

else

e=0;

s=a+c+e;

printf("工资为：%f\n",s);

return 0;

}