C语言程序常考题.doc.doc

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1、1将成绩分为A，B，C等的程序#includevoidmain(){intscore;chargrade;printf("Pleaseinputascore:");scanf("%d",&score);grade=score>=90?'A':(score>=60?'B':'C');printf("%dbelongsto%c",score,grade);}2判断是数字，字母，还是其他字符#includevoidmain(){charc;printf("Pleaseinputacharacter:");c=getchar

2、();if(c>='A'&&c<='Z'

3、

4、c>='a'&&c<='z')printf("%cisletter",c);elseif(c>='0'&&c<='9')printf("%cisdigit",c);elseprintf("%cisothercharacter",c);}3三角形面积#include#includevoidmain(){floata,b,c,s,area;scanf("%f,%f,%f",&a,&b,&c);s=(a+b+c)/2.0;area=sqrt(s*(s-a)*(s-b)*(s-c

5、));printf("a=%7.2f,b=%7.2f,c=%7.2f",a,b,c);printf("area=%7.2f,s=%7.2f",area,s);}4输入数字，即可得到相应星期单词#includevoidmain(){intx;printf("Inputintegernumber:");scanf("%d",&x);switch(x){case1:printf("Monday");break;case2:printf("Tuesday");break;case3:printf("Wednesday");brea

6、k;case4:printf("Thursday");break;case5:printf("Friday");break;case6:printf("Saturday");break;case7:printf("Sunday");break;default:printf("error");}}5圆的周长，面积，球的体积，表面积，圆柱体积#include#definePI3.1415926voidmain(){floatr,h,l,s,sq,vq,vz;printf("请输入圆半径r,圆柱高h:");scanf("%f,%

7、f",&r,&h);l=2*PI*r;s=PI*r*r;sq=4*PI*r*r;vq=4.0/3.0*PI*r*r*r;vz=PI*r*r*h;printf("圆周长：l=%6.2f",l);printf("圆面积：s=%6.2f",s);printf("圆球表面积：sq=%6.2f",sq);printf("圆球体积：sv=%6.2f",vq);printf("圆柱体积：sz=%6.2f",vz);}6某分段函数，输入X求解Y的值#includevoidmain(){floatx,y;printf("Pleaseinpu

8、tx:");scanf("&f",&x);if(x<-1)y=1;elseif(x<=1)y=2*x-5;elsey=5*x*x-1;printf("y=%10f",y);}7比较输入的两个数，并输出较大值#includevoidmain(){floatx,y,max;printf("Pleaseinputtwonumberx,y:");scanf("%f,%f",&x,&y);if(x>y)max=x;elsemax=y;printf("max=%7.2f",max);}例5.10 求两个整数的最大公约数和最小公倍数。#include<

9、stdio.h>void main( ){int m,n,p,t,r;scanf(“%d,%d”,&m,&n);if(nvoid main( ){int  a,b,c,i;a=c=0;for(i=0;i<=10;i+=2;){a+=I;b=i+1;c+=b;}pri

10、ntf(“偶数之和=%d”,a);