c程序设计课后题部分答案(谭浩强版)

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1、沈阳航空航天大学自动化学院测控技术与仪器专业5.4有3个整数a,b,c，由键盘输入，输出其中最大的数。#includevoidmain(){inta,b,c;printf("Pleaseinputany3numbers:");scanf("%d,%d,%d",&a,&b,&c);if(a>b){if(a>c)printf("themaxnumberis%d.",a);elseprintf("themaxnumberis%d.",c);}else{if(b>c)printf("themaxnumberis%d.",b);elsepr

2、intf("themaxnumberis%d.",c);}}5.5#includevoidmain(){floatx,y;printf("Pleaseinputx:");scanf("%f",&x);if(x<1)y=x;else{if(x<10)y=2*x-1;elsey=3*x-11;}printf("y=%f.",y);}5.6#includevoidmain(){intscore,grade;printf("pleaseinputscore:");Xs200912沈阳航空航天大学自动化学院测控技术与仪器专

3、业scanf("%d",&score);grade=score/10;switch(grade){case10:case9:printf("A");break;case8:printf("B");break;case7:printf("C");break;case6:printf("D");break;default:printf("E");}}5.7#include"stdio.h"voidmain(){intnum,place,ge,shi,bai,qian,wan;printf("请输入任一不多于5位的正整数:");scanf("%d

4、",&num);if(num>9999)place=5;else{if(num>999)place=4;else{if(num>99)place=3;else{if(num>9)place=2;elseplace=1;}}}printf("该数是%d位数.",place);switch(place){case5:{wan=num/10000;qian=(num-10000*wan)/1000;bai=(num-10000*wan-1000*qian)/100;shi=(num-10000*wan-1000*qian-100*bai)/10;ge=num%10;

5、printf("每一位数字是:%d,%d,%d,%d,%d",wan,qian,bai,shi,ge);printf("按逆序输出各位数字，为:%d,%d,%d,%d,%d",ge,shi,bai,qian,wan);};break;case4:{qian=num/1000;bai=(num-1000*qian)/100;shi=(num-1000*qian-100*bai)/10;ge=num%10;printf("每一位数字是:%d,%d,%d,%d",qian,bai,shi,ge);Xs200912沈阳航空航天大学自动化学院测控技术与仪器专业p

6、rintf("按逆序输出各位数字，为:%d,%d,%d,%d",ge,shi,bai,qian);};break;case3:{bai=num/100;shi=(num-100*bai)/10;ge=num%10;printf("每一位数字是:%d,%d,%d",bai,shi,ge);printf("按逆序输出各位数字，为:%d,%d,%d",ge,shi,bai);};break;case2:{shi=num/10;ge=num%10;printf("每一位数字是:%d,%d",shi,ge);printf("按逆序输出各位数字，为:%d,%d

7、",ge,shi);};break;default:printf("一位数字按逆序输出和正常输出都是:%d.",num);}}5.8If语句编程序#include"stdio.h"voidmain(){inti,j;printf("请输入当月利润:");scanf("%d",&i);if(i<=100000)j=0.1*i;else{if(i<=200000)j=(i-100000)*0.075+100000*0.1;else{if(i<=400000)j=100000*0.1+100000*0.075+(i-200000)*0.05;else{if(

8、i<=60