实验二三参考答案.doc

实验二2_2.#includeint main(void)printf(The size of int is %d.n,sizeof(int);printf(The size of long is %d.n,sizeof(long);printf(The size of float is %d.n,sizeof(float);printf(The size of double is %d.n,sizeof(double);printf(The size of char is %d.n,sizeof(char);return 0;2_5.#includeint main(void)printf(1: %cn,E);printf(2: %cn,105);printf(3: %cn,x45);return 0;2_7.#includeint main(void)int length,width,height,volume;printf(please input length,width,height:); scanf(%d,%d,%d,&length,&width,&height); volume=length*width*height;printf(the volume is %dn,volume);return 0;2_8.#includeint main(void)enum colorRed,Green,Blue;enum color R,G,B,*pr,*pg,*pb;R=Red;G=Green;B=Blue;pr=&R;pg=&G;pb=&B;printf(%d-%d-%dn,*pr,*pg,*pb); return 0;实验三3_2.#include#includeint main(void)unsigned int a,b,n,mode;clrscr(); scanf(%u,&a); n=16; b=a; mode=0x8000; printf(%u in binary format is:,a); while(n0) printf(%d,b/mode); /*输出一位*/ b=b%mode; mode=mode/2; n=n-1; printf(n); return 0;3_3.#include#include#includeint main(void)float num,sign,deci;int inte;clrscr();printf(please input a real number:);scanf(%f,&num);if(num0)printf(sign:+n);elseif(num0)printf(sign:-n);elseprintf(sign:0n);inte=num;deci=num-inte;printf(integral part: %dn,abs(inte);printf(decimal fraction part: %fn,fabs(deci); return 0;3_4.#include#includeint main(void)unsigned int num,kilobit,cenbit,tenbit,indivbit;clrscr(); scanf(%u,&num);kilobit=num/1000;cenbit=num/100%10;tenbit=num/10%10;indivbit=num%10; printf(%u can be seperated to:%u-%u-%u-%un,num,kilobit,cenbit,tenbit,indivbit); return 0;3_5.#include#include#includeint main(void)double x,y,a,b,c,d,e;clrscr(); printf(input two numbers:);scanf(%lf,%lf,&x,&y);a=sin(x);b=cos(x);c=fabs(x); d=exp(x);e=pow(x,y); printf(sin(%f)=%fn,x,a); printf(cos(%f)=%fn,x,b); printf(|%f|=%fn,x,c); printf(exp(%f)=%fn,x,d); printf(pow(%f,%f)=%fn,x,y,e); return 0;3_6.#include#include#includeint main(void)int a,b,c;float s,area;clrscr();printf(input the length of triangle: );scanf(%d,%d,%d,&a,&b,&c);s=(a+b+c)/2.0;area=sqrt(s*(s-a)*(s-b)*(s-c);printf(the area of triangle is:%fn,area);return 0;3_7.#include#includeint main(void)float num=100.453627;clrscr();printf(%f-%10.1fn,num,num);printf(%f-%10.2fn,num,num);printf(%f-%10.3fn,num,num);printf(%f-%10.4fn,num,num);return 0;3_8.#include#includeint main(void)char p1name,p2name;float p1math,p1phy,p1chem;float p2math,p2phy,p2chem;float p1average,p1sum;float p2average,p2sum;clrscr();printf(Please input student 1s name:);scanf( %c,&p1name);printf(Math:);scanf(%f,&p1math);printf(Physics:);scanf(%f,&p1phy);printf(Chemstry:);scanf(%f,&p1chem);p1sum=p1math+p1phy+p1chem;p1average=p1sum/3;printf(Please input student 2s name:);scanf( %c,&p2name);printf(Math:);scanf(%f,&p2math);printf(Physics:);scanf(%f,&p2phy);printf(Chemstry:);scanf(%f,&p2chem);p2sum=p2math+p2phy+p2chem;p2average=p2sum/3;printf(*n);printf(* NAME MATH PHYSICS CHEMSTRY SUM AVERAGE *n);printf(*%5c%7.1f%8.1f%9.1f%6.1f%8.1f