[工学]天津科技大学2012--2013学年大一C语言程序设计课本课后编程参考答案

1、/3-1矩形面积 #includevoid main()float a,b;float c,area;printf(nplease input a,b:);scanf(%f%f,&a,&b);c=(a+b)*2;area=a*b;printf(c=%f,area=%fn,c,area);/3-2输入三位数，输出它各个数位上的数字#includevoid main()int m,a,b,c;printf(nplease input 三位整数:);scanf(%d,&m);a=m/100;b=m/10%10;c=m%10;printf(a=%d,b=%d,c=%dn,a,b,c);/3-3大写字母

2、转换#includevoid main()char ch;printf(nplease input 大写字母:);scanf(%c,&ch);ch=(ch=a&ch=z)?ch=ch+32:ch;printf(ch=%cn,ch);/3-3大写字母转换方法二#includevoid main()char ch;printf(nplease input 大写字母:);scanf(%c,&ch);if (ch=a&ch=z)ch=ch+32;printf(ch=%cn,ch);/4-1已知圆半径和高，求周长，面积，表面积，体积和圆柱体积#define pi 3.14#include#include

3、void main()double r,h,c,area,s,v,u;printf(n请输入圆的半径和高:);scanf(%lf%lf,&r,&h);c=2*pi*r;area=pi*pow(r,2);s=4*pi*pow(r,2);v=4.0/3*pi*pow(r,3);u=pi*pow(r,2)*h;printf(c=%lf,area=%lf,s=%lf,v=%lf,u=%lfn,c,area,s,v,u);/4-2输入华氏温度求摄氏温度#includevoid main()float f,c;printf(n请输入f:);scanf(%f,&f);c=(f-32)*5/9;printf(

4、c=%fn,c);/4-3输入五位整数，将它反向输出#includevoid main()int m,a,b,c,d,e,f;printf(请输入五位整数:);scanf(%d,&m);a=m/10000;b=(m-a*10000)/1000;c=(m-a*10000-b*1000)/100;d=(m-a*10000-b*1000-c*100)/10;e=m-a*10000-b*1000-c*100-d*10;f=e*10000+d*1000+c*100+b*10+a;printf(%d对调后是%dn,m,f);/4-4人口#include#includevoid main()double n

5、,r;r=0.8/100;n=log(2)/log(r+1) ;printf(n%lf年后我国人口超过26亿,n);/4-5求二点间的距离#include#includevoid main()float x1,y1,x2,y2,l;printf(请输入平面坐标系中二个点的坐标x1 y1 x2 y2:);scanf(%f%f%f%f,&x1,&y1,&x2,&y2);l=pow(pow(x1-x2,2)+pow(y1-y2,2),0.5);printf(二点之间的距离为l=%fn,l);/求两点间的距离方法2#include#includevoid main()float x1,y1,x2,y2

6、,l;printf(请输入平面坐标系中二个点的坐标x1 y1 x2 y2:);scanf(%f%f%f%f,&x1,&y1,&x2,&y2);l=sqrt(pow(x1-x2,2)+pow(y1-y2,2);printf(二点之间的距离为l=%fn,l);/4-6矩形草坪，求所需时间#define v 0.18#includevoid main()float a,b,t;printf(请输入矩形草坪的长和宽:);scanf(%f%f,&a,&b);t=a*b/v;printf(所需时间t=%fn,t);/4-7实发工资#includevoid main()int a;double b,m;pr

7、intf(请输入基本工资a=800和本月的营业额b:n);scanf(a=%d %lf,&a,&b);m=a+b*5.0/100;printf(实发工资为%lf元,m);/4-8冰箱断电后温度#includevoid main()double a,b,t,t;printf(请输入冰箱断电后的小时数a和分钟数b:);scanf(%lf%lf,&a,&b);t=a+b/60;t=4*t*t/(t+2)-20;printf(断电%lf小时后冰箱内的温度为%lf摄氏度,t,t);/4-9社区人数#includevoid main()int m;double a,b;printf(请输入社区的人数m:)

8、;scanf(%d,&m);a=(15-2)*14*(float)m/3;b=a/1000*3.4*365*10-1000*(float)m/3;printf(每天节约的用水量为%lf升,节约的开销为%lf元,a,b);/5-1输入整数，判断其是否能同时被6,9,14整出。#includevoid main()int a;scanf(%d,&a);if (a%6=0&a%9=0&a%14=0)printf(能同时被6,9,14整除n);else printf(不能同时被6,9,14整除n);/5-2 输入一个年号，判断该年号是否闰年#includevoid main()long a;print

9、f(n 请输入一个年号:)scanf(%ld,&a);if (a%4=0&a%100!=0)|(a%400=0)printf(是闰年n);else printf(不是闰年n);/5-3.将4个变量由大到小排列#includevoid main()float a,b,c,d,t;scanf(%f%f%f%f,&a,&b,&c,&d);if (ab)t=a,a=b,b=t;if(ac)t=a,a=c,c=t;if(ad)t=a,a=d,d=t;if(bc)t=b,b=c,c=t;if(bd)t=b,b=d,d=t;if(cd)t=c,c=d,d=t;printf(a=%f b=%f c=%f d=

10、%f,a,b,c,d);/ 5-4.输入一个字符，判断其类型#includevoid main()char a;scanf(%c,&a);if (48=a&a=57)printf(a是数字);else if(65=a&a=90)printf(a是大写字母);else if (97=a&a=122)printf(a是小写字母);else printf(a是其他字符);/5-5输入x，求f(x);#includevoid main()float x,y;scanf(%f,&x);if (x=0&x=10&x100)y=2*x+100;elsey=x*x;printf(%gn,y);/5-6.输入a

11、,b,按公式计算y；#include#includevoid main()float a,b,y;printf(n please input a,b:);scanf(%f%f,&a,&b);if(a0&b0)y=log(a)+log(b);else if(a0&b=0)y=sin(a)+sin(b);else if(0=a)y=sin(a)+cos(b);printf(y=%fn,y);/ 5-7.输入分子和分母，判断其满足题意条件否。#includevoid main()int a,b,x,y;scanf(%d%d,&a,&b);x=a/10; y=b%10;if (a%10)=(b/10)

12、 if (1.0*a/b)=(1.0*x/y)printf(符合条件n);else printf(不符合条件n);else printf(不符合条件n);/ 5-8输入3位整数，判断满足条件否#includevoid main()int x,a,b,c,y;scanf(%d,&x);y=x/9;a=x/100;b=x/10%10;c=x%10;if (y=a*a+b*b+c*c)printf(符合条件n);elseprintf(不符合条件n);/ 5-9.判断2位整数是否为守形数#includevoid main()int x,a,b,c,y;scanf(%d,&x);y=x*x;a=y/10

13、%10;b=x%10;c=10*a+b;if (x=c)printf(是守形数n);/99 de 2 ci fangelseprintf(不是守形数n);/5-10输入上衣和裤子数目，计算收款总额#includevoid main()int a,b,x,y; scanf(%d%d,&a,&b);if(a=50&b=50)if (ab)y=80*b+60*(a-b);elsey=80*a+45*(b-a); else if (ab) y=90*b+60*(a-b);else y=90*a+45*(b-a); printf(%dn,y); / 5-11.计算输出税金#includevoid mai

14、n()float x,y; scanf(%f,&x);if (x=10000)y=x*0.05;else if (x=5000&x=5000就行了y=x*0.03;else if (x=1000&x5000)y=x*0.02;elsey=0;printf(%gn,y);/ 5-12.计算个人所得税金额#includevoid main()float a,b,c,d,e,f,g,h,i,j,x,y;printf(please input an:);scanf(%f,&a);b=0.05*(a-1600);c=0.1*(a-2100);d=0.15*(a-3600);e=0.2*(a-6600);

15、f=0.25*(a-21600);g=0.3*(a-41600);h=0.35*(a-61600);i=0.4*(a-81600);j=0.45*(a-101600);x=a/1000;if (x=1.6)y=0;if (1.6x&x=2.1)y=b;else if (2.1x&x=3.6)y=25+c;else if (3.6x&x=6.6)y=25+150+d;else if (6.6x&x=21.6)y=25+150+450+e;else if (21.6x&x=41.6)y=25+150+450+3000+f;else if (41.6x&x=61.6)y=25+150+450+300

16、0+5000+g;else if (61.6x&x=81.6)y=25+150+450+3000+5000+6000+h;else if (81.6x&x=101.6)y=25+150+450+3000+5000+6000+7000+i;else if (101.6x)y=25+150+450+3000+5000+6000+7000+8000+j;printf(应纳个人所得税为%g元n,y); / 5-13输入年和月份，判断该月对应天数#include void main ()int y,m;printf(nplease input y m:);scanf(%d%d,&y,&m);if(y%4

17、=0&y%100)|y/400!=0)switch (m)case 1:case 3:case 5:case 7:case 8:case 10:case 12:printf(天数31天);break;case 2:printf (天数29);break;case 4:case 6:case 9:case 11:printf(天数30天);break;else switch (m)case 1:case 3:case 5:case 7:case 8:case 10:case 12:printf(天数31天);break;case 2:printf (天数28);break;case 4:case

18、 6:case 9:case 11:printf(天数30天);break;default:printf (errorn);/5-14计算总运费#include void main ()int f,w,s,d,p,t;printf(nplease input p w s);scanf (%d%d%d,&p,&w,&s);t=p*w*s;if(s=250)f=t;else if(s500)f=p*w*s*(1-0.02);elseif(s1000)f=p*w*s*(1-0.05);elseif(s2000)f=t*(1-0.08);elseif(s=3000)f=t*(1-0.15);print

19、f(总费用%d,f);/6-1计算2*x*x+3*x+1#includevoid main() int i;long s;for(s=0,i=1;i=20;i+)s=s+2*i*i+3*i+1;printf(%ldn,s);/6-2打印1-10000中的所有闰年#includevoid main()int a,n;a=1;n=0;for(a=1;a=10000;a+)if (a%4=0&a%100!=0)|(a%400=0) n+;if (n%10=0)printf(%6dn,a);elseprintf(%6d,a);/6-3人口超过26亿#includevoid main()double n

20、,y;n=0;for(y=13;y=26;) n+;y=y+y*0.008;printf(%fn,n);/6-4#includevoid main() int i;double s;for(s=0,i=1;1.0/(i*i)=0.000001;i+)s=s+1.0/(i*i);printf(%lfn,s);/6-5计算圆周率#includevoid main() int i;double s;for(s=2,i=1;i=1000;i+)s=s*2*i*2*i/(2*i-1)*(2*i+1);printf(%lfn,s);/6-6计算分序数列#includevoid main() int i,t

21、,m,k;double s;for(m=1,k=2,s=2,i=1;i=19;i+)t=k+m;m=k;k=t;s=s+(float)k/m;printf(%lfn,s);/6-7#include#includevoid main()int n;float t,y,s;n=1;t=1,y=1,s=0;while(y=pow(10,-6)y=1/t;s=s+y;t=t+n;n+;printf(s等于%fn,s);/6-8求1-10的阶乘之和#includevoid main()int n;double y,s;n=1;y=0,s=1;while(n=10)s=s*n;y=y+s;n+;print

22、f(y等于%lfn,y);/6-9输入x和n，求x+x2+.+xn的和#includevoid main() int n,i,k;float x,s;printf(n please input x,n:);scanf(%f %d,&x,&n);for(k=1,s=0,i=1;i=n;i+) k=k*x;s=s+k;printf(s=%fn,s);/6-9方法二#include#includevoid main()int n,i;double x,y,s;i=1,y=0;printf(请输入x,nn);scanf(%lf%d,&x,&n);while(i=n)s=pow(x,i);y=y+s;i

23、+;printf(y等于%lfn,y);/6-10求自然对数e#include#includevoid main()int n;double t,y,s;n=1;y=1,s=1;while(fabs(y-exp(1)0.00001)s=s*n;t=1/s;y=y+t;n+;printf(y等于%lfn,y); /6-11求ex#include#includevoid main()int n;double x,s,y;s=1,y=1;printf(请输入x:);scanf(%lf,&x);for(n=1;n=100;n+)s=s*n;y=y+pow(x,n)/s;printf(%lf,y);/6

24、-12所有的水仙花数#includevoid main() int n,i,a,b,c;n=0;for(i=100;i=999;i+)a=i/100;b=i/10%10;c=i%10;if(i=a*a*a+b*b*b+c*c*c) n+;if(n%10=0)printf(%6dn,i);elseprintf(%6d,i);/6-13求s=a+aa+aaa+.+a(n个a)#includevoid main() int n,i;float a,t,s;printf(n please input a,n:);scanf(%f %d,&a,&n);for(t=0,s=0,i=1;i=n;i+) t=

25、t*10+a;s=s+t;printf(s=%fn,s);/6-14所有的守形数#include#define m 2#define n 1000000void main() int num,count=0,i,j,lenth=0;printf(从%d到%d之中的守形数n,m,n);for(i=m;i=n;i+) num=i;j=1;while(num!=0) num=num/10;lenth+;while(lenth!=0) j=10*j;lenth-;if(i*i-i)%j=0) printf(%dt,i);count+;printf(n 共有%d个,count);/6-15100以内的勾

26、股数#includevoid main() int x,y,z;printf(xyzn);for(x=0;x=100;x+)for(y=0;y=100;y+)for(z=0;z=100;z+)if(xy&yz&z*z=x*x+y*y)printf(%5d%5d%5dn,x,y,z);/6-161000以内的完数#includevoid main()int m,i,s;printf(suo you wan shun:);for(m=1;m=1000;m+)for(s=0,i=1;i=m-1;i+)if(m%i=0)s=s+i;if(s=m)printf(%6dn,m);/6-17计算整数m和n的

27、公约数之和#includevoid main()long m,n,i,s;printf(qing shu ru m ,n:);scanf(%ld%ld,&m,&n);if(mn)i=n;else i=m;for(s=0;i=1;i-)if(m%i=0&n%i=0)s=s+i;printf(%ldn,s);/6-18#includevoid main()int i,j;for(i=1;i=5;i+)for(j=1;j=5-i;j+)printf( );printf(*n);/6-19搬砖问题#includevoid main()int x,y,z;printf(nan rennv ren xia

28、ohai n);for(x=0;x=0&z=0)printf(%6d%6d%6dn,x,y,z);/6-20爱因斯坦阶梯问题#includevoid main() long i;for(i=1;i=1000;i+)if(i%2=1&i%3=2&i%5=4&i%6=5&i%7=0)printf(%ldn,i);/6-21计算鸡蛋数目#includevoid main() int i;for(i=101;i100)printf(%dn,i);/6-22循环输入100个数，求他们的和，平均值#includevoid main()int i;double x,s,v;printf(qing shu r

29、u 100 ge shu :);scanf(%lf,&x);printf(100 ge shu:n);printf(%5lf,x);s=x;for(i=2;i=100;i+)scanf(%lf,&x);printf(%5lfn,x);s=s+x;v=s/100;printf(he wei %lfn,s);printf(ping jun zhi wei %lfn,v);/6-23循环输入100个分数，统计90分以上，80-89,70-79,60-69,60以下的个数#includevoid main()int i,x,a,b,c,d,e;a=0;b=0;c=0;d=0;e=0;printf(qi

30、ng shu ru 100 ge cheng ji :);for(i=1;i=90)a+;else if(x=80)b+;else if(x=70)c+;else if(x=60)d+;elsee+;printf(90 fen yi shang wei %dn,a);printf(80 fen yi shang wei %dn,b);printf(70 fen yi shang wei %dn,c);printf(60 fen yi shang wei %dn,d);printf(60 fen yi xia wei %dn,e);/6-24球的反弹问题#includevoid main()in

31、t i;double f,s;for(s=100,f=100,i=2;i=10;i+)s=s+f;f=f/2;printf(di 10 ci jing guo %lf min,s);printf(di 10 ci fan tan %lf min,f);/6-25赛车问题#includevoid main()int b,c,d;for(b=0;b=1;b+)for(c=0;c=1;c+)for(d=0;d=1;d+)if(b+c+d=1)if(b=1)+(d=1)+(c!=1)+(d!=1)=1)if(b=1)printf(a dui ,2 hao zui jian);if(d=1)printf

32、(b dui ,4 hao zui jian);if(c=1)printf(d dui ,3 hao zui jian);/6-26新郎新娘问题#includevoid main()char a,b,c,d;for(a=w;a=z;a+)for(b=w;b=z;b+)for(c=w;c=z;c+)for(d=w;d=z;d+)if(a!=b&a!=c&a!=d&b!=c&b!=d&c!=d)if(a!=w&a!=y&(b=y|b=z)&c=x&d=w)printf(a-%cn,a);printf(b-%cn,b);printf(c-%cn,c);printf(d-%cn,d);/6-27梯形法

33、求定积分#includevoid main()double n,w,x,s,a,b;printf(please input a,b:n);scanf(%lf%lf,&a,&b);n=100000;w=(b-a)/n;s=0;for(x=a;x=b;x=x+w)s=s+(x*x+13*x+1+(x+w)*(x+w)+13*(x+w)+1)*w/2;printf(ji fen wei %lfn,s);/6-28牛顿迭代法求实根#include#define pi3.141595#includevoid main()double x0,x1;x0=pi;x1=x0-(2*sin(x0)-x0)/(2

34、*cos(x0)-1);while(fabs(x1-x0)=0.0001)x0=x1;x1=x0-(2*sin(x0)-x0)/(2*cos(x0)-1);printf(gen wei %lfn,x1);/6-29.打印九九乘法表#includevoid main()int i,j,s;for(i=1;i=9;i+)for(j=1;j=i;j+)s=j*i;printf(%2d*%2d=%2d ,j,i,s);printf(n);方法二#includevoid main()int i,j;for(i=1;i=1;i+)j=1*i;printf(1*%d=%dn,i,j);for(i=1;i=2

35、;i+)j=2*i;printf(2*%d=%d ,i,j);printf(n);for(i=1;i=3;i+)j=3*i;printf(3*%d=%d ,i,j);printf(n);for(i=1;i=4;i+)j=4*i;printf(4*%d=%d ,i,j);printf(n);for(i=1;i=5;i+)j=5*i;printf(5*%d=%d ,i,j);printf(n);for(i=1;i=6;i+)j=6*i;printf(6*%d=%d ,i,j);printf(n);for(i=1;i=8;i+)j=8*i;printf(8*%d=%d ,i,j);printf(n)

36、;for(i=1;i=9;i+)j=9*i;printf(9*%d=%d ,i,j);/7-1 100个学生成绩的一维数组求所有元素的和与平均值#include #include#includevoid main()int a100;int i,s=0;float v;srand(time(0); for(i=0;i=99;i+) ai=rand()%100; printf(学生成绩为:n); for(i=0;i=99;i+) printf(%10d,ai); printf(n); for(i=0;i=99;i+) s=s+ai; v=s*1.0/100; printf(所有成绩的和为%dn,

37、s); printf(平均值为%fn,v);/7-2 100个整数的一维数组，统计奇数和偶数的个数并求平均值#include #include#includevoid main()int a100;int i,s,m,n;float v;srand(time(0);for(i=0;i=99;i+)ai=rand()%100;for(i=0;i=99;i+) printf(%5d,ai); printf(n);m=0;n=0;s=0; for(i=0;i=90 80-89 70-79 60-69 60以下的数目#include #include#includevoid main()int a10

38、0;int i,f,b,c,d,e;srand(time(0); for(i=0;i=99;i+) ai=rand()%100;for(i=0;i=99;i+) printf(%5d,ai); printf(n); f=0;b=0;c=0;d=0;e=0; for(i=0;i=90&ai=80) b+; else if(ai=70) c+; else if(ai=60) d+; else e+; printf( 90以上的%dn 80以上的%dn 70以上的%dn 60以上的%dn 60以下的%dn,f,b,c,d,e);/7-4输出1-500之间能被7或11整除，但不能同时被7和11整除的所

39、有整数#include void main()int a500;int i;for(i=1;i=500;i+)if(i%7=0|i%11=0)&i%77!=0)ai=i;printf(%4d,ai);printf(n);/7-4方法二#include void main()int a500;int i;for(i=1;i=500;i+)if(i%7=0|i%11=0)&(i%7!=0|i%11!=0)ai=i;printf(%4d,ai);printf(n);/7-5 100个元素的一维数组，将其反序存放后并输出#include #include #include void main() in

40、t a100; int i; srand(time(0); for( i=0;i=99;i+ ) ai=rand()%100; for( i=0;i=0;i-) printf(%4d,ai);printf(n);/7-6 定义100个0-9之间的整数的一维数组，分别统计其中0-9的数目#include #include#includevoid main()int a100;int i,b,c,d,e,f,g,h,m,j,k;srand(time(0);printf (请输入100个0到9之间的整数n); for(i=0;i=99;i+) ai=rand()%10; for( i=0;i=99;

41、i+ ) printf(%5d,ai);printf(n); b=c=d=e=f=g=h=m=j=k=0; for(i=0;i=99;i+)if(ai=9)b+;if(ai=8)c+; if(ai=7)d+;if(ai=6)e+;if(ai=5)f+;if(ai=4)g+;if(ai=3)h+; if(ai=2)m+;if(ai=1)j+;if(ai=0)k+; printf( 9的个数 %dn 8的个数 %dn 7的个数 %dn 6的个数 %dn 5的个数 %dn 4的个数 %dn 3的个数 %dn 2的个数 %dn 1的个数 %dn 0的个数 %dn ,b,c,d,e,f,g,h,m,j,k);/7-7 #include void main()int a20;int i;a0=1;a1=3;for(i=2;i=19;i+)ai=ai-1+2*(i+