C语言上机实验部分答案整理.doc

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1、C语言上机实验部分答案实验二：2-2-1#includevoidmain(){floatscore;chargrade;printf("pleaseinputastudent'score:");scanf("%f",&score);while(score>100

2、

3、score<0){printf("inputerror,tryagain!");scanf("%f",&score);}switch(score/10){case10:case9:grade='A';break;case8:grade='B';break;case7:grade='

4、C';break;case6:grade='D';break;case5:case4:case3:case2:case1:case0:grade='E';}printf("scoreis%5.1f,scoregradeis%c.",score,grade);}2-2-2#include"stdio.h"voidmain(){intdata1,data2,result1,result2;charop;printf("请输入两个操作数，以,分隔");scanf("%d,%d",&data1,&data2);getchar();printf("请输入一个操作符

5、(+或-)");scanf("%c",&op);switch(op){case'+':result2=data1+data2;break;case'-':result2=data1-data2;break;}printf("请输入结果以判断程序运行结果是否正确！");scanf("%d",&result1);if(result1==result2)printf("Perfect!%d%c%d=%d",data1,op,data2,result2);elseprintf("Error!%d%c%d=%d",data1,op,data2,res

6、ult2);}2-2-3`#include"stdio.h"voidmain(){floatx,y;printf("请输入X的值");scanf("%f",&x);if(x<0)y=0;elseif(x<10)y=x;elseif(x<20)y=10;elseif(x<40)y=-0.5*x+20;elseprintf("输入出错(x<40)");printf("%.2f",y);}2-2-4#includemain(){intchoice;printf("------------------------------");printf("Th

7、eMenuofDataManagement");printf("1.InputData");printf("2.OutputData");printf("3.InsertData");printf("4.DeleteData");printf("5.QiutSysterm");printf("------------------------------");printf("Pleaseenteryourchoice:");scanf("%d",&choice);switch(choice){case1:printf("InputData

8、");break;case2:printf("OutputData");break;case3:printf("InsertData");break;case4:printf("DeleteData");break;case0:printf("QiutSysterm");break;default:printf("error!");}}2-3-2#includevoidmain(){inti,j,s;for(i=1;i<=9;i++){for(j=i;j<=9;j++){s=i*j;printf("%d*%d=%d",i,

9、j,s);}if(j>=9)printf("");}}2-3-3#includevoidmain(){longremainder,result,sum=0;printf("pleaseinputanumber!");scanf("%ld",&result);while(result){remainder=result%10;result=result/10;sum+=remainder;}printf("%ld",sum);}2-3-4#includevoidmain(){floata,average,sum=0,

10、max,m