C++程序编写.doc

实验目的：学习if-else语句计算分段函数；for循环语句；函数的作业一 （上机完成）实验指导P20：4实验指导P27：3、5实验指导P30：4 作业二（做本子上，下次上机调试）教材P38习题2：2、4、6、8 参考答案： #include#includeint main(void)double x,y;printf(Enter x:);scanf(%lf,&x);if(x0)y=(x+1)*(x+1)+2*x+(1/x);elsey=sqrt(x);printf(f(%.2f)=%.2fn,x,y);return 0;# includeint main(void)int i,m,n;double sum;printf(Enter m,n(mn):);scanf(%d%d,&m,&n);sum=0;for(i=m;i=n;i+)sum=sum+1.0/i;printf(sum=%.3lfn,sum);return 0;# includeint main(void)int n,deno,flag,i;double item,sum;printf(Enter n:);scanf(%d,&n);flag=1;deno=1;sum=0;for(i=1;i=n;i+)item=flag*1.0/deno;sum=sum+item;flag=-flag;deno=deno+3;printf(sum=%.3fn,sum);return 0;# include# includeint main(void)int i;double sum;sum=0;for(i=100;i=1000;i+)sum=sum+sqrt(i);printf(sum=%.2lfn,sum);return 0;P31：1 该实验的调试程序在下面的压缩包里，请自行下载调试。P34-36：7、8、9书P57：习题3的3、5题第3题可以参考书38页习题2的第2题。#include#includeint main(void)double a,b,c,s,area,perimeter;printf(Entera,b,c:);scanf(%lf%lf%lf,&a,&b,&c);if (a+b)c&(b+c)a&(a+c)b)s=(a+b+c)/2;area=sqrt(s*(s-a)*(s-b)*(s-c);perimeter=(a+b+c);printf(area=%.2lf,perimeter=%.2lfn,area,perimeter);elseprintf(These sides do not correspond to a void trianglen);return 0;#include int main(void)double tax,rate,salary;printf(Enter salary:);scanf(%lf,& salary);if (salary=850)rate=0;else if(salary=1350)rate=0.05;else if(salary=2850)rate=0.1;else if(salary=5850)rate=0.15;elserate=0.2;tax=rate*(salary-850);printf(tax=%.2lfn,tax);return 0;# includeint main(void)int n,a,b,c,d,e,i;double grade;a=0;b=0;c=0;d=0;e=0;printf(Enter n:);scanf(%d,&n);for (i=1;i=n;i+)printf(Enter grade #%d:,i);scanf(%lf,&grade);if(grade60)e+;else if(grade=69)d+;else if(grade=79) c+;else if(grade=89)b+;elsea+;printf(a=%d,b=%d,c=%d,d=%d,e=%dn,a,b,c,d,e);return 0;#includeint main(void)int t;double s,money;printf(Enter s,t:);scanf(%lf%d,&s,&t);s=s+t/5; /* t为整型，t/5结果为整型*/if(s=3)money=10;else if(s=10)money=10+(s-3)*2;elsemoney=24+(s-10)*3;printf(%.0fn,money);return 0;#includeint main(void)int i,count=0;for(i=2000;i2100;i+)if(i%4=0|i%400=0)&(i%100!=0)printf(%6d,i);count+;if(count%4=0)printf(n);/* 控制每行输出4个年份 */printf(n);return 0;实验指导P30：3 作业三（做本子上的，本次上机调试） 教材P38习题2：2、4、6、8 （选做）#includedouble fact(int n);int main(void)int i,n,m;double result;printf(Enter n,m-(n=m):);scanf(%d%d,&n,&m);result=fact(n)/fact(m)/fact(n-m);printf(C(%d)(%d)=%.0fn,m,n,result);return 0;double fact(int n)int i;double product;product=1;for(i=1;i=n;i+)product=product*i; return product;#includeint main(void)float x,y;printf(Enter x:);scanf(%f,&x);if(x=50)y=0.53*x;elsey=0.53*50+(x-50)*0.58;printf(y=%.2fn,y);return 0;#include#includeint main(void)int i,m,n;double sum;printf(Enter m,n-(nm):);scanf(%d%d,&m,&n);sum=0;for(i=m;i=n;i+)sum=sum+(pow(i,2)+1.0/i);/ 也可以用：sum=sum+i*i+1.0/i;printf(sum=%0.3fn,sum);return 0;#include#includeint main(void)int month,year;double money,loan,rate;printf(Enter loan,rate:);scanf(%lf%lf,&loan,&rate);for(month=60;m