c程序第1章习题参考答案.doc

习题1参考答案一、单项选择题DADDDB CCD（注：第7小题无正确选项，正确答案为-12）二、填空题 主 main x=x*(x+b) 普通、格式、分隔和转义 指定输出数据格式 void main() how are you! 三、阅读程序题1.9,11,9,10 2.2,-1,-13.aa bb cc abc4.2,25.57 5 767.5864000,-789.12402367.5864000, -7.89e+002 67,86, -789.12,67.5864000, -789.124023, 67.5864000, -789.1240236.758640e+001, -7.89e+002A,65,101,411234567,4553207,12d68765535,177777,ffff,65535COMPUTER, COM.6. a + c = 102a + c = ff + m = 17.950000a + m = 17.650000c + f = 102.300000double = 1746.150019四、程序设计题/xt010401.cpp#include #define PI 3.1415926void main()double r,h;printf(请输入半径r和高h：);scanf(%lf,%lf,&r,&h);printf(圆半径: %lfn,2*PI*r);printf(圆面积：%lfn,PI*r*r);printf(圆球表面积：%lfn,4*PI*r*r);printf(圆球体积：%lfn,4.0/3*PI*r*r);printf(圆柱体积：%lfn,PI*r*r*h);/xt010402.cpp#include void main()int c;printf(Input a character:);c=getchar();printf(%ct%dn,c,c);/xt010403.cpp#include void main()int x,y,h=30,f=90;x=(4*h-f)/2;y=(f-2*h)/2;printf(鸡：%d, 兔：%dn,x,y);/xt010404.cpp#include #include void main()double a,b,c,s,area;printf(请输入三角形的三条边长（注意三条边长应能够构成三角形）：);scanf(%lf,%lf,%lf,&a,&b,&c);s=(a+b+c)/2;area=sqrt(s*(s-a)*(s-b)*(s-c);printf(三角形的面积是: %lfn,area);/xt010405.cpp#include void main()double f,c;printf(请输入华氏温度：);scanf(%lf,&f);c=5.0/9.0*(f-32);printf(与华氏温度%.2lf对应的摄氏温度是：%.2lfn,f,c);/xt010406.cpp#include void main()char c1,c2,c3,c4,c5;printf(请输入需加密的字符串（5个字符）：);c1=getchar();c2=getchar();c3=getchar();c4=getchar();c5=getchar();printf(加密后的字符串是：);putchar(