C语言顺序、选择结构试验报告

实验报告课程名称 程序设计语言C/C++ 实验项目 顺序结构，选择结构编程与调试 一、实验目的.掌握C语言中使用最多的一种语句一一赋值语句的使用方法。.掌握各种数据类型的输入输出的方法，能正确使用各种格式转换符。.掌握选择结构程序设计的方法和用用关系表达式、逻辑表达式表示选择结构的条件。二、实验内容.调试关于各种格式转换符的正确使用方法的程序并验证结果的正确性。.编写并调试简单的关于数据类型输入输出的程序。.编写并调试运行关于if语句和switch语句使用的程序。三、实验步骤及结果分析1.从键盘输入两个整数，求两数之和并输出。#include<stdio.h>intmain(){inta,b,c;printf(〃请输入两个整数：\n〃)；scanf("%d,%d",&a,&b);c=a+b;printf("两数之和为:%d\n",c);return0;)请输入两个整数：&24两数之和为二32Pressanykeytocontinue

2.从键盘输入园的半径r,求园的周长C、面积S并输出。#include<stdio.h>Pleaseentertheradiusofthecircle：8.8Th©circumferenceofth©circleCis55.29Th©areaofth©circleis243.28PressanykeytocontinuemRQmufRipneaseienReRiaiRhReeBdngnRinumbeRHi^^^^^^^^^^^^^^^^^^^^^^^^^^^MPleaseenterathree-digitnumber:824Thesumofth巳digitsofthisthree-digitnumberis14Pressanykeytocontinuedisc=pow(b,2)-4*a*c;if(disc>=0){p=-b/(2.00*a);q=sqrt(disc)/(2.00*a);x1=p+q;x2=p-q;printf("Therealrootsofthisequationare:x1=%.2f;x2=%.2f\n”,x1,x2);)elseprintf("Thisequationhasn,trealroots.\n");return0;)Pleaseinputthecorrelationcoefficientofthisequation：2,&4Therealrootsofthisequationare:2[l=-0,59;x2=-3.41Pressanykeytocontinue7.从键盘输入3个整数，求最大的数。#include<stdio.h>intmain(){inta,b,c,max;printf("Pleaseinputthreenumbers：\n");scanf("%d,%d,%d",&a,&b,&c);max=a;if(max<b)max=b;if(max<c)max=c;printf("Thelargestnumberis%d\n”,max);return0;)Pleaseinputthreenumbers:&24,11Thelargestnumberis24Pressanykeytocontinuex (x<1)8.有一函数y=^2x-1 (1<x<10)3x-11(x>10)编写程序：输入乂，输出y值。#include<stdio.h>intmain()intx,y;printf("Pleaseinputanumber:");scanf("%d",&x);if(x<1)y=x;else{if(x>=1&&x<10)y=2*x-1;elsey=3*x-11;printf("y=%d\n",y);}3n0;Pleaseinputanumber：-7y=-7PressanykeytocontinuePleaseinputanumber：8y=15PressanykeytocontitiuePleaseinputanumber：24y^=61Pressanykeytocontinue.输入百分制成绩，要求输出对应的等级A〜E090分以上为’A’，80-89分为’B’，70-79分为’C’，60-69分为‘D,，60分以下为‘E’。#include<stdio.h>intmain(){inta;printf("Pleaseinputascore:");scanf("%d",&a);if((a>100)||(a<0))printf("Thisscoreisworng.\n");elseif((a>=90)&&(a<=100))printf("Yourgradeis:A\n");elseif((a>=80)&&(a<90))printf("Yourgradeis:B\n");elseif((a>=70)&&(a<80))printf("Yourgradeis:C\n");elseif((a>=60)&&(a<70))printf("Yourgradeis:D\n");elseprintf("Yourgradeis:E\n");return0;)Pleaseinputascore：101Thisscoreisworng.PressanykeytocontinuePleaseinputascore：88Yourgradeis：BPressanykeytocontitiue.编写程序：输入月收入，输出应交个人所得税金额。个人所得税税率级数应纳税所得额（月）税率速算扣除数1不超过1500元部分3%02超过1500元至4500元部分10%1053超过4500至9000元部分20%5554超过9000至35000元部分25%10055超过35000至55000元部分30%27556超过55000至80000元部分35%55057超过80000元的部分45%13505个人所得税金额=（月收入-个人所得税起征点）X税率一速算扣除数个人所得税起征点为3500元。#include<stdio.h>intmain()doublew,p,a;printf("Pleaseinputyourmonthlyincome:");scanf("%lf",&w);if(w<3500)printf("Yourpersonalincometaxamountis0.\n");elsea=w-3500;if(a<=1500)p=a*0.03;elseif((a>1500)&&(a<=4500))p=a*0.10-105;elseif((a>4500)&&(a<=9000))p=a*0.20-555;elseif((a>9000)&&(a<=35000))p=a*0.25-1005;elseif((a>35000)&&(a<=55000))p=a*0.30-2755;elseif((a>55000)&&(a<=80000))p=a*0.35-5505;elsep=a*0.45-13505;printf("Yourpersonalincometaxamountis:%lf\n”,p);「eturn0;Pleaseinputyourmonthlyincome：2000You