《C语言程序设计》(苏小红)-课后习题答案-高等教育出版社

2.2 #include

main()

{

floatx=2.5,y=2.5,z=2.5;

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

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

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

}

3.1(1) #include

main()

{

inta=12,b=3;

floatx=18.5,y=4.6;

printf("%d\n",(float)(a*b)/2);

printf("%d\n",(int)x%(int)y);

}

3.2 #include

main()

{

intx,b0,b1,b2,s;

printf("Inputx:");

scanf("%d",&x);

b2=x/100;

b1=(x-b2*100)/10;

b0=x%10;

s=b0*100+b1*10+b2;

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

}

3.3 #include

#include

main()

{

floatrate=0.0225;

floatn,capital,deposit;

printf("Inputn,capital:");

scanf("%f,%f",&n,&capital);

deposit=capital*pow(1+rate,n);

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

}

3.4 #include

#include

main()

{

floata,b,c;

doublex,y;

printf("Inputa,b,c:");

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

x=(-b+sqrt(b*b-4*a*c))/(2*a);

y=(-b-sqrt(b*b-4*a*c))/(2*a);

printf("x=%f,y=%f\n",x,y);

}

4.1(1) #include

main()

{

charc1='a',c2='b',c3='c';

printf("a%cb%cc%c\n",c1,c2,c3);

}

4.1(2) #include

main()

{

inta=12,b=15;

printf("a=%d%%,b=%d%%\n",a,b);

}

4.1(3) #include

main()

{

inta,b;

scanf("%2d%*2s%2d",&a,&b);

printf("%d,%d\n",a,b);

}

4.2 #include

main()

{

longa,b;

floatx,y;

scanf("%d,%d\n",&a,&b);

scanf("%f,%f\n",&x,&y);

printf("a=%d,b=%d\n",a,b);

printf("x=%f,b=%f\n",x,y);

}

5.1 #include

main()

{

floata;

printf("Innputa:");

scanf("%f",&a);

if(a>=0)

{

a=a;

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

}