谭浩强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(max<b)max=b;
 if(max<c)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%c\n",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
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=%2d\n",a,b,c);
 printf("x=%8.6f,y=%8.6f,z=%9.6f\n",x,y,z);
 printf("x+y=%5.2f  y+z=%5.2f  z+x=%5.2f\n",x+y,y+z,z+x);
 printf("u=%6ld  n=%9ld\n",u,n);
 printf("c1='%c'or %d(ASCII)\n",c1,c1);
 printf("c2='%c'or %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;
c程序设计谭浩强pdf百度网盘 printf("input r,h\n");
 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=%6.2f\n",l);
 printf("s=%6.2f\n",s);
 printf("sq=%6.2f\n",sq);
 printf("vq=%6.2f\n",sv);
 printf("vz=%6.2f\n",sz);
}
3.9
main()
{float c,f;
 scanf("%f",&f);
 c=(5.0/9.0)*(f-32);
 printf("c=%5.2f\n",c);
}
3.10
#include"stdio.h"
main()
{char c1,c2;
 scanf("%c,%c",&c1,&c2);
 putchar(c1);
 putchar(c2);
 printf("\n");
 printf("%c%c\n",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(a<b)
  if(b<c)
    printf("max=%d\n",c);
  else
    printf("max=%d\n",b);
 else if(a<c)
    printf("max=%d\n",c);
 else
    printf("max=%d\n",a);
}
main()
{int a,b,c,temp,max;
 scanf("%d,%d,%d",&a,&b,&c);
 temp=(a>b)?a:b;
 max=(c>temp)?c:temp;
 printf("max=%d",max);
}
 
4.5
main()
{int x,y;
 scanf("%d",&x);
 if(x<1)y=x;
 else if(x<10)y=2*x-1;
 else y=3*x-11;
 printf("y=%d",y);
}
4.6
main()
{int score,temp,logic;
 char grade;
 logic=1;
 while(logic)
  {scanf("%d",&score);
    if(score>=0&&score<=100)logic=0;
  }
 if(score==100)
  temp=9;
 else
  temp=(score-score%10)/10;
 switch(temp)
  {case 9:grade='A';break;
    case 8:grade='B';break;
    case 7:grade='C';break;
    case 6:grade='D';break;
    case 5:
    case 4:
    case 3:
    case 2:
    case 1:
    case 0:grade='E';
  }
 printf("score=%d,grade=%c",score,grade);
}
4.7
main()
{long int num;
 int indiv,ten,hundred,thousand,ten_thousand,place;
 scanf("%ld",&num);
 if(num>9999) place=5;
 else if(num>999) place=4;
 else if(num>99) place=3;
 else if(num>9) place=2;
 else place=1;
 printf("place=%d\n",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;

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