C语言程序设计习题相关解答.docx

谭浩强C语言程序设计习题答案C语言程序设计习题参考答案 第一章 1.6 main() int a,b,c,max; printf(input three numbers:n); scanf(%d,%d,%d,&a,&b,&c); max=a; if(maxb)max=b; if(maxc)max=c; printf(max=%d,max); 第二章 2.3 (1)(10)10=(12)8=(a)16 (2)(32)10=(40)8=(20)16 (3)(75)10=(113)8=(4b)16 (4)(-617)10=(176627)8=(fd97)16 (5)(-111)10=(177621)8=(ff91)16 (6)(2483)10=(4663)8=(963)16 (7)(-28654)10=(110022)8=(9012)16 (8)(21003)10=(51013)8=(520b)16 2.6 aabb (8)cc (8)abc (7)AN 2.7 main() char c1=C,c2=h,c3=i,c4=n,c5=a; c1+=4, c2+=4, c3+=4, c4+=4, c5+=4; printf(%c%c%c%c%cn,c1,c2,c3,c4,c5); 2.8 main() int c1,c2; c1=97;c2=98; printf(%c %c,c1,c2); 2.9 (1)=2.5 (2)=3.5 2.10 9,11,9,10 1 2.12 (1)24 (2)10 (3)60 (4)0 (5)0 (6)0 第三章 3.4 main() int a,b,c; long int u,n; float x,y,z; char c1,c2; a=3;b=4;c=5; x=1.2;y=2.4;z=-3.6; u=51274;n=128765; c1=a;c2=b; printf(n); printf(a=%2d b=%2d c=%2dn,a,b,c); printf(x=%8.6f,y=%8.6f,z=%9.6fn,x,y,z); printf(x+y=%5.2f y+z=%5.2f z+x=%5.2fn,x+y,y+z,z+x); printf(u=%6ld n=%9ldn,u,n); printf(c1=%cor %d(ASCII)n,c1,c1); printf(c2=%cor %d(ASCII)n,c2,c2); 3.5 57 5 7 67.856400,-789.123962 67.856400,-789.123962 67.86 -789.12,67.856400,-789.123962,67.856400,-789.123962 6.785640e+001,-7.89e+002 A,65,101,41 1234567,4553207,d687 65535,177777,ffff,-1 COMPUTER, COM 3.6 a=3 b=7/ x=8.5 y=71.82/ c1=A c2=a/ 3.7 10 20Aa1.5 -3.75 +1.4,67.8/ (空3)10(空3)20Aa1.5(空1)-3.75(空1)(随意输入一个数)，67.8回车 3.8 main() float pi,h,r,l,s,sq,sv,sz; pi=3.1415926; printf(input r,hn); 2 scanf(%f,%f,&r,&h); l=2*pi*r; s=r*r*pi; sq=4*pi*r*r; sv=4.0/3.0*pi*r*r*r; sz=pi*r*r*h; printf(l=%6.2fn,l); printf(s=%6.2fn,s); printf(sq=%6.2fn,sq); printf(vq=%6.2fn,sv); printf(vz=%6.2fn,sz); 3.9 main() float c,f; scanf(%f,&f); c=(5.0/9.0)*(f-32); printf(c=%5.2fn,c); 3.10 #includestdio.h main() char c1,c2; scanf(%c,%c,&c1,&c2); putchar(c1); putchar(c2); printf(n); printf(%c%cn,c1,c2); 第四章 4.3 (1)0 (2)1 (3)1 (4)0 (5)1 4.4 main() int a,b,c; scanf(%d,%d,%d,&a,&b,&c); if(ab) if(bc) printf(max=%dn,c); else printf(max=%dn,b); else if(ab)?a:b; max=(ctemp)?c:temp; printf(max=%d,max); 4.5 main() int x,y; scanf(%d,&x); if(x1)y=x; else if(x=0&score9999) place=5; else if(num999) place=4; else if(num99) place=3; else if(num9) place=2; else place=1; printf(place=%dn,place); ten_thousand=num/10000; thousand=(num-ten_thousand*10000)/1000; hundred=(num-ten_thousand*10000-thousand*1000)/100; ten=(num-ten_thousand*10000-thousand*1000-hundred*100)/10; indiv=num-ten_thousand*10000-thousand*1000-hundred*100-ten*10; switch(place) case 5:printf(%d,%d,%d,%d,%dn,ten_thousand,thousand,hundred,ten,indiv); printf(%d,%d,%d,%d,%dn,indiv,ten,hundred,thousand,ten_thousand); break; case 4:printf(%d,%d,%d,%dn,thousand,hundred,ten,indiv); printf(%d,%d,%d,%dn,indiv,ten,hundred,thousand); break; case 3:printf(%d,%d,%dn,hundred,ten,indiv); printf(%d,%d,%dn,indiv,ten,hundred); break; case 2:printf(%d,%dn,ten,indiv); printf(%d,%dn,indiv,ten); break; case 1:printf(%dn,indiv); printf(%dn,indiv); 4.8 main() long i; float bonus,bon1,bon2,bon4,bon6,bon10; bon1=100000*0.1; bon2=bon1+100000*0.075; bon4=bon2+200000*0.05; bon6=bon4+200000*0.03; bon10=bon6+400000*0.015; 5 scanf(%ld,&i); if(i=1e5)bonus=i*0.1; else if(i=2e5)bonus=bon1+(i-100000)*0.075; else if(i=4e5)bonus=bon2+(i-200000)*0.05; else if(i=6e5)bonus=bon4+(i-400000)*0.03; else if(i10)branch=10; switch(branch) case 0:bonus=i*0.1;break; case 1:bonus=bon1+(i-100000)*0.075;break; case 2: case 3:bonus=bon2+(i-200000)*0.05;break; case 4: case 5:bonus=bon4+(i-400000)*0.03;break; case 6: case 7 case 8: case 9:bonus=bon6+(i-600000)*0.015;break; case 10:bonus=bon10+(i-1000000)*0.01; printf(bonus=%10.2f,bonus); 4.9 main() int t,a,b,c,d; scanf(%d,%d,%d,%d,&a,&b,&c,&d); if(ab)t=a;a=b;b=t; if(ac)t=a;a=c;c=t; if(ad)t=a;a=d;d=t; 6 if(bc)t=b;b=c;c=t; if(bd)t=b;b=d;d=t; if(cd)t=c;c=d;d=t; printf(%d %d %d %dn,a,b,c,d); 4.10 main() int h=10; float x,y,x0=2,y0=2,d1,d2,d3,d4; scanf(%f,%f,&x,&y); d1=(x-x0)*(x-x0)+(y-y0)*(y-y0); d2=(x-x0)*(x-x0)+(y+y0)*(y+y0); d3=(x+x0)*(x+x0)+(y-y0)*(y-y0); d4=(x+x0)*(x+x0)+(y+y0)*(y+y0); if(d11&d21&d31&d41)h=0; printf(h=%d,h); 第五章 循环控制 5.1 main() int a,b,num1,num2,temp; scanf(%d,%d,&num1,&num2); if(num1=a&c=A&c=0&c=9)digit+; else other+; printf(letters=%dnspace=%dndigit=%dnother=%dn,letters,space,digit,other); 7 5.3 main() int a,n,count=1,sn=0,tn=0; scanf(%d,%d,&a,&n); while(count=n) tn+=a; sn+=tn; a*=10; +count; printf(a+aa+aaa+.=%dn,sn); 5.4 main() float n,s=0,t=1; for(n=1;n=20;n+) t*=n; s+=t; printf(s=%en,s); 5.5 main() int N1=100,N2=50,N3=10; float k; float s1=0,s2=0,s3=0; for(k=1;k=N1;k+)s1+=k; for(k=1;k=N2;k+)s2+=k*k; for(k=1;k=N3;k+)s3+=1/k; printf(s=%8.2fn,s1+s2+s3); 5.6 main() int i,j,k,n; for(n=100;n1000;n+) i=n/100; j=n/10-i*10; k=n%10; if(i*100+j*10+k=i*i*i+j*j*j+k*k*k) printf(n=%dn,n); 5.7 #define M 1000 8 main() int k0,k1,k2,k3,k4,k5,k6,k7,k8,k9; int i,j,n,s; for(j=2;j=M;j+) n=0; s=j; for(i=1;i1)printf(%d,%d,k0,k1); if(n2)printf(,%d,k2); if(n3)printf(,%d,k3); if(n4)printf(,%d,k4); if(n5)printf(,%d,k5); if(n6)printf(,%d,k6); if(n7)printf(,%d,k7); if(n8)printf(,%d,k8); if(n9)printf(,%dn,k9); main() static int k10; int i,j,n,s; for(j=2;j=1000;j+) n=-1; s=j; 9 for(i=1;ij;i+) if(j%i)=0) n+; s=s-i; kn=i; if(s=0) printf(j=%dn,j); for(i=0;in;i+) printf(%d,ki); printf(%dn,kn); 5.8 main() int n,t,number=20; float a=2;b=1;s=0; for(n=1;n=number;n+) s=s+a/b; t=a,a=a+b,b=t; printf(s=%9.6fn,s); 5.9 main() float sn=100.0,hn=sn/2; int n; for(n=2;n0) x1=(x2+1)*2; x2=x1; 10 day-; printf(x1=%dn,x1); 5.11 #includemath.h main() float a,xn0,xn1; scanf(%f,&a); xn0=a/2; xn1=(xn0+a/xn0)/2; do xn0=xn1; xn1=(xn0+a/xn0)/2; while(fabs(xn0-xn1)=1e-5); printf(a=%5.2fn,xn1=%8.2fn,a,xn1); 5.12 #includemath.h main() float x,x0,f,f1; x=1.5; do x0=x; f=(2*x0-4)*x0+3)*x0-6; f1=(6*x0-8)*x0+3; x=x0-f/f1; while(fabs(x-x0)=1e-5); printf(x=%6.2fn,x); 5.13 #includemath.h main() float x0,x1,x2,fx0,fx1,fx2; do scanf(%f,%f,&x1,&x2); fx1=x1*(2*x1-4)*x1+3)-6; fx2=x2*(2*x2-4)*x2+3)-6; while(fx1*fx20); do x0=(x1+x2)/2; 11 fx0=x0*(2*x0-4)*x0+3)-6; if(fx0*fx1)=1e-5); printf(x0=%6.2fn,x0); 5.14 main() int i,j,k; for(i=0;i=3;i+) for(j=0;j=2-i;j+) printf( ); for(k=0;k=2*i;k+) printf(*); printf(n); for(i=0;i=2;i+) for(j=0;j=i;j+) printf( ); for(k=0;k=4-2*i;k+) printf(*); printf(n); 5.15 main() char i,j,k; for(i=x;i=z;i+) for(j=x;j=z;j+) if(i!=j) for(k=x;k=z;k+) if(i!=k&j!=k) if(i!=x&k!=x&k!=z) printf(na-%ctb-%ctc-%cn,i,j,k); 12 第六章 数组 6.1 #include #define N 101 main() int i,j,line,aN; for (i=2;iN;i+) ai=i; for (i=2;isqrt(N);i+) for (j=i+1;jN;j+) if(ai!=0 & aj!=0) if (aj%ai=0) aj=0; printf(n); for (i=2,line=0;iN;i+) if(ai!=0) printf(%5d,ai); line+; if(line=10) printf(n); line=0; 6.2 #define N 10 main() int i,j,min,temp,aN; for(i=0;iN;i+) scanf(%d,&ai); for(i=0;iN-1;i+) min=i; for(j=i+1;jaj)min=j; temp=ai; ai=amin; amin=temp; for(i=0;iN;i+) printf(%5d,ai); 6.3 main() float a33,sum; 13 int i,j; for(i=0;i3;i+) for(j=0;j3;j+) scanf(%f,&sum); aij=sum; for(i=0;iend) a10=number; else for(i=0;inumber) temp1=ai; ai=number; for(j=i+1;j11;j+) temp2=aj; aj=temp1; temp1=temp2; break; for(i=0;i11;i+) printf(%6d,ai); 6.5 #define N 5 main() int aN=8,6,5,4,1,i,temp; for(i=0;iN/2;i+) temp=ai; ai=aN-i-1; aN-i-1=temp; for(i=0;iN;i+) 14 printf(%4d,ai); 6.6 #define N 11 main() int i,j,aNN; for(i=1;iN;i+) aii=1; ai1=1; for(i=3;iN;i+) for(j=2;ji;j+) aij=ai-1j-1+ai-1j; for(i=1;iN;i+) for(j=1;j=i;j+) printf(%6d,aij); printf(n); 6.7 main() int a1616,i,j,k,p,m,n; p=1; while(p=1) scanf(%d,&n); if(n!=0)&(n=15)&(n%2!=0)p=0; for(i=1;i=n;i+) for(j=1;j=n;j+) aij=0; j=n/2+1; a1j=1; for(k=2;k=n*n;k+) i=i-1; j=j+1; if(in) i=i+2; j=j-1; else if(in)j=1; if(aij=0)aij=k; 15 else i=i+2; j=j-1; aij=k; for(i=1;i=n;i+) for(j=1;j=n;j+) printf(%3d,aij); printf(n); 6.8 #define N 10 #define M 10 main() int i,j,k,m,n,flag1,flag2,aNM,max,maxi,maxj; scanf(%d,%d,&n,&m); for(i=0;in;i+) for(j=0;jm;j+) scanf(%d,&aij); flag2=0; for(i=0;in;i+) max=ai0; for(j=0;jm;j+) if(maxaij) max=aij; maxj=j; for(k=0,flag1=1;kakmaxj)flag1=0; if(flag1) printf(na%d%d=%dn,i,maxj,max); flag2=1; if(!flag2) printf(NOT); 6.9 #include #define N 15 main() int i,j,number,top,bott,min,loca,aN,flag; char c; 16 for(i=0;i=N;i+) scanf(%d,&ai); flag=1; while(flag) scanf(%d,&number); loca=0; top=0; bott=N-1; if(numberaN-1) loca=-1; while(loca=0)&(top=bott) min=(bott+top)/2; if(number=amin) loca=min; printf(number=%d,loca=%dn,number,loca+1); else if(numberamin) bott=min-1; else top=min+1; if(loca=0|loca=-1) printf(%d not in tablen,number); printf(continue Y/N or y/nn); c=getchar(); if(c=N|c=n)flag=0; 6.10 main() int i,j,uppn,lown,dign,span,othn; char text380; uppn=lown=dign=span=othn=0; for(i=0;i3;i+) gets(texti); for(j=0;j=A&textij=a&textij=0&textij=9) dign+; else if(textij= ) span+; 17 else othn+; for(i=0;i3;i+) printf(%sn,texti); printf(uppn=%dn,uppn); printf(lown=%dn,lown); printf(dign=%dn,dign); printf(span=%dn,span); printf(othn=%dn,othn); 6.11 main() static char a5=*,*,*,*,*; int i,j,k; char space= ; for(i=0;i=5;i+) printf(n); for(j=1;j=3*i;j+) printf(%1c,space); for(k=0;k=5;k+) printf(%3c,ak); 6.12 #include main() int i,n; char ch80,tran80; gets(ch); i=0; while(chi!=0) if(chi=A)&(chi=a)&(chi=z) trani=26+96-chi+1+96; else trani=chi; i+; n=i; for(i=0;in;i+) putchar(trani); 18 6.13 main() char s180,s240; int i=0,j=0; scanf(%s,s1); scanf(%s,s2); while(s1i!=0)i+; while(s2j!=0)s1i+=s2j+; s1i=0; printf(s=%sn,s1); 6.14 #include main() int i,resu; char s1100,s2100; gets(s1); gets(s2); i=0; while(s1i=s2i)&(s1i!=0)i+; if(s1i=0&s2i=0)resu=0; else resu=s1i-s2i; printf(s1=%s,s2=%s,resu=%dn,s1,s2,resu); 6.15 #includestdio.h main() char from80,to80; int i; scanf(%s,from); for(i=0;iv)t=u;u=v;v=t; a=u;b=v; while(r=b%a)!=0) 19 b=a;a=r; return(a); lcd(u,v,h) int u,v,h; return(u*v/h); main() int u,v,h,l; scanf(%d,%d,&u,&v); h=hcf(u,v); printf(H.C.F=%dn,h); l=lcd(u,v,h); printf(L.C.D=%dn,l); 7.2 #includemath.h float x1,x2,disc,p,q; greater_than_zero(a,b) float a,b; x1=(-b+sqrt(disc)/(2*a); x2=(-b-sqrt(disc)/(2*a); equal_to_zero(a,b) flaot a,b; x1=x2=-b/(2*a); smaller_than_zero(a,b) float a,b; p=-b/(2*a); q=sqrt(-disc)/(2*a); main() float a,b,c; scanf(%f,%f,%f,&a,&b,&c); disc=b*b-4*a*c; if(fabs(disc)0) greater_than_zero(a,b); printf(x1=%5.2ftx2=%5.2fn,x1,x2); else smaller_than_zero(a,b); 20 printf(x1=%5.2f+%5.2fitx2=%5.2f-%5.2fin,p,q,p,q); 7.3 main() int number; scanf(%d,&number); if(prime(number) printf(yes); else printf(no); int prime(number) int number; int flag=1,n; for(n=2;nnumber/2&flag=1;n+) if(number%n=0) flag=0; return(flag); 7.4 #define N 3 int arrayNN; convert(array) int array33; int i,j,t; for(i=0;iN;i+) for(j=i+1;jN;j+) t=arrayij; arrayij=arrayji; arrayji=t; main() int i,j; for(i=0;iN;i+) for(j=0;jN;j+) scanf(%d,&arrayij); convert(array); for(i=0;iN;i+) printf(n); for(j=0;jN;j+) printf(%5d,arrayij); 21 7.5 main() char str100; scanf(%s,str); inverse(str); printf(%sn,str); inverse(str) char str; char t; int i,j; for(i=0,j=strlen(str);i0;i-) stri*2=stri; stri*2-1= ; printf(%sn,str); 7.9 int alph,digit,space,others; main() char text80; gets(text); alph=0,digit=0,space=0,others=0; count(text); printf(nalph=%d,digit=%d,space=%d,others=%dn,alph,digit,space,others); count(str) char str; int i; for(i=0;stri!=0;i+) if(stri=a&stri=A&stri=0&stri=a&c=A&c=Z) return(1); else return(0); int longest(string) char string; int len=0,i,length=0,flag=1,place,point; for(i=0;ilength) length=len; place=point; len=0; return(place); main() int i; char line100; gets(line); for(i=longest(line);alph(linei);i+) printf(%c,linei); printf(n); 7.11 #define