C语言程序的设计苏小红版答案.docx

2.2 *include<stdio.h>
main()
{
float *=2.5,y=2.5,z=2.5;
printf("*=%f\n",*);
printf("y=%f\n",y);
printf("z=%f\n",z);
}
3.1(1) *include<stdio.h>
main()
{
int a=12,b=3;
float *=18.5,y=4.6;
printf("%d\n",(float)(a*b)/2);
printf("%d\n",(int)*%(int)y);
}
3.2 *include<stdio.h>
main()
{
int *,b0,b1,b2,s;
printf("Input*:");
scanf("%d",&*);
b2=*/1;
b1=(*-b2*1)/10;
b0=*%10;
s=b0*1+b1*10+b2;
printf("s=%d\n",s);
}
3.3 *include<stdio.h>
*include<math.h>
main()
{
float rate=0.0225;
float n,capital,deposit;
printf("Input n,capital:");
scanf("%f,%f",&n,&capital);
deposit=capital*pow(1+rate,n);
printf("deposit=%f\n",deposit);
}
3.4 *include<stdio.h>
*include<math.h>
main()
{
float a,b,c;

double *,y;
printf("Inputa,b,c:");
scanf("%f,%f,%f",&a,&b,&c);
*=(-b+sqrt(b*b-4*a*c))/(2*a);
y=(-b-sqrt(b*b-4*a*c))/(2*a);
printf("*=%f,y=%f\n",*,y);
}
4.1(1) *include<stdio.h>
main()
{
char c1='a',c2='b',c3='c';
printf("a%cb%cc%c\n",c1,c2,c3);
}
4.1(2) *include<stdio.h>
main()
{
int a=12,b=15;
printf("a=%d%%,b=%d%%\n",a,b);
}
4.1(3) *include<stdio.h>
main()
{
int a,b;
scanf("%2d%*2s%2d",&a,&b);
printf("%d,%d\n",a,b);
}
4.2 *include<stdio.h>
main()
{
long a,b;
float *,y;
scanf("%d,%d\n",&a,&b);
scanf("%f,%f\n",&*,&y);
printf("a=%d,b=%d\n",a,b);
printf("*=%f,b=%f\n",*,y);
}
5.1 *include<stdio.h>
main()
{
float a;
printf("Innputa:");
scanf("%f",&a);
if(a>=0)
{

a=a;
printf("a=%f\n",a);
}
else
{
a=-a;
printf("a=%f\n",a);
}
}
5.2 *include<stdio.h>
main()
{
int a;
printf("Inputa:");
scanf("%d",&a);
if(a%2==0)
{
printf(是偶数");
}
else
{
printf(是奇数");
}
}
5.3 *include<stdio.h>
*include<math.h>
main()
{
float a,b,c,s,area;
printf("Inputa,b,c:");
scanf("%f,%f,%f",&a,&b,&c);
if(a+b>c&&a+c>b&&b+c>a)
{
s=(a+b+c)/2;
area=(float)sqrt(s*(s-a)*(s-b)*(s-c));
printf("area=%f\n",area);
}
else
{
printf即是三角形");
}
}
5.4 *include<stdio.h>
*include<math.h>

main()
{
float a,b,c,*,y;
printf("Inputa,b,c:");
scanf("%f,%f,%f",&a,&b,&c);
if(a==0)
{
printf诙方程不是一元二次方程\n");
}
if(b*b-4*a*c>0)
{
*=(-b+sqrt(b*b-4*a*c))/(2*a);
y=(-b-sqrt(b*b-4*a*c))/(2*a);
printf("*=%f,y=%f\n",*,y);
}
else if(b*b-4*a*c==0)
{
*=-b/(2*a);
y=-b/(2*a);
printf("*=%f,y=%f\n",*,y);
}
else
{
printf诙方程无实根\n");
}
}
5.5 *include<stdio.h>
main()
{
int year,flag;
printf("Input a year:");
scanf("%d",&year);
if(year%4==0&&year%4!=0||year%4==0)
{
flag=1;
}
else
{
flag=0;
}
if(flag==1)
{
printf("%d is a leap year !\n",year);
}

else
{
printf("%d is not a leap year !\n",year);
}
}
5.6 *include<stdio.h>
main()
{
int year,flag;
printf("Input a year:");
scanf("%d",&year);
flag=year%4==0||year%4==0&&year%1!=0"1:0;
if(flag==1&&flag!=0)
{
printf("%d is a leap year !\n",year);
}
else
{
printf("%d is not a leap year !\n",year);
}
}
5.7 *include<stdio.h>
main()
{
char ch;
printf("Inputch:");
scanf("%c",&ch);
if(ch>='a'&&ch<='z')
{
ch=getchar();
ch=ch-32;
printf("%c,%d\n",ch,ch);
}
else if(ch>='A'&&ch<='Z')
{
ch=getchar();
ch=ch+32;
printf("%c,%d\n",ch,ch);
}
else
{
printf("%c",ch);
}
}

5.8 *include<stdio.h>
main()
{
char ch;
printf("Inputch:");
scanf("%c",&ch);
if(ch>=48&&ch<=57)
{
printf("是数字字符\n");
}
else if(ch>=65&&ch<=90)
{
printf("是大写字母\n");
}
else if(ch>=97&&ch<=122)
{
printf("是h 小写字母 \n");
}
else if(ch==32)
{
printf("是空格\n");
}
else
{
printf("是其他字符\n");
}
}
5.9 *include<stdio.h>
main()
{
int score,grade;
printf("Input score:");
scanf("%d",&score);
grade=score/10;
if(score<0||score>1)
{
printf("Input error\n");
}
if(score>=90&&score<=1)
{
printf("%d—A\n",score);
}
else if(score>=80&&score<90){

printf("%d--B\n",score);
}
else if(score>=70&&score<80)
{
printf("%d--C\n",score);
}
else if(score>=60&&score<70)
{
printf("%d--D\n",score);
}
else if(score>=0&&score<60)
{
printf("%dE\n",score);
}
}
5.10 *include<stdio.h>
main()
{
int year,month;
printf("Input year,month:");
scanf("%d,%d",&year,&month);
if(month>12||month<=0)
{
printf("error month\n");
}
else
{
switch(year,month)
{
case 12:
case 10:
case 8:
case 7:
case 5:
case 3:
case 1:
printf("天\n");
break;
case 11:
case 9:
case 6:
case 4:
printf("天\n");
break;

case 2:
if(year%4==0&&year!=0||year%4==0)
{
printf("天\n");
}
else
{
printf("天\n");
}
break;
default:
printf("Input error\n");
}
}
}
6.1(1) *include<stdio.h>
main()
{
int i,j,k;
char space='';
for(i=1;i<=4;i++)
{
for(j=1;j<=i;j++)
{
printf("%c",space);
}
for(k=1;k<=6;k++)
{
printf("*");
}
printf("\n");
}
}
6.1(2) *include<stdio.h>
main()
{
int k=4,n;
for(n=0;n<k;n++)
{
if(n%2==0) continue;
k--;
}
printf("k=%d\n,n=%d\n",k,n);
}

6.1(3) *include<stdio.h>main(){
int k=4,n;
for(n=0;n<k;n++)
{if(n%2==0) break;k--;
}
printf("k=%d,n=%d\n",k,n);
}
6.2(1) *include<stdio.h>main(){
int i,sum=0;
for(i=1;i<=101;i++)
{sum=sum+i;
}
printf("sum=%d\n",sum);
}
6.2(2) *include<stdio.h>main(){
long i;
long term,sum=0;
for(i=1;i<=101;i=i+2)
{term=i*(i+1)*(i+2);sum=sum+term;
}
printf("sum=%ld\n",sum);
}
6.2(4) *include<stdio.h>*include<math.h>main(){
int n=1;
float term=1.0,sign=1,sum=0;
while(term<=-1e-4||term>=1e-4){
term=1.0/sign;sum=sum+term;sign=sign+n;

n++;
}
printf("sum=%f\n",sum);
}
6.2(5) *include<stdio.h>
*include<math.h>
main()
{
int n=1,count=1;
float *;
double sum,term;
printf("Input *:");
scanf("%f",&*);
sum=*;
term=*;
do{
term=-term****/((n+1)*(n+2));
sum=sum+term;
n=n+2;
count++;
}while(fabs(term)>=1e-5);
printf("sin(*)=%f,count=%d\n",sum,count);
}
6.3 *include<stdio.h>
main()
{
int *=1,find=0;
while(!find)
{
if(*%2==1&&*%3==2&&*%5==4&&*%6==5&&*%7==0)
{
printf("*=%d\n",*);
find=1;
*++;
}
}
}
/* int *,find=0;
for (*=1;!find;*++)
{
if(*%2==1&&*%3==2&&*%5==4&&*%6==5&&*%7==0)
{
printf("*=%d\n",*);
find=1;

}*/
6.4 *include<stdio.h>
main()
{
int i,n;
long p=1,m=1;
printf("Input n:");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
p=i*i;
m=i*i*i;
printf("p=%d,m=%d\n",i,p,i,m);
}
}
6.5 *include<stdio.h>
main()
{
float c,f;
for(c=-40;c<=110;c=c+10)
{
f=9/5*c+32;
printf("f=%f\n",f);
}
}
6.6 *include<stdio.h>
*include<math.h>
main()
{
int n;
double c=0.01875,*;
do(
*=**pow(1+c,12)-10;
n++;
}while(*>0);
printf("*=%d\n",*);
}
6.7 *include<stdio.h>
main()
{
int n=0;
float a=1.0,c;

printf("Inputc:");
scanf("%f",&c);
do
{
a=a*(1+c);
n++;
}while(a<=2);
printf("n=%d\n",n);
}
6.8 *include<stdio.h>
*include<math.h>
main()
{
int n=1,count=1;
double sum=1,term=1;
while(fabs(term)>=1e-5)
{
term=pow(-1,count)*(1.0/(n+2));
sum=sum+term;
n=n+2;
count++;
}
sum=4*sum;
printf( "sum=%f,count=%d\n",sum,count);
}
6.9 *include<stdio.h>
*include<math.h>
main()
{
int n=1,count=1;
double sum=1,term=1;
while(fabs(term)>=1e-5)
{
term=term*(1.0/n);
sum=sum+term;
n++;
count++;
}
printf("sum=%f,count=%d\n",sum,count);
}
6.10 *include<stdio.h>
*include<math.h>
main()
{

int *;
for(*=1;*<=999;*++)
{
if(*==pow(*/1,3)+pow(*/10%10,3)+pow(*%10,3))printf("*=%d\n",*);
}
}
6.11 *include<stdio.h>
main()
{
int i=0,n;
long sum=0,term=1;
printf("Inputn:");
scanf("%d",&n);
do(
i++;
term=term*i;
sum=sum+term;
}while(sum<n);
printf("%d\n",i-1);
}
6.12 *include<stdio.h>
main()
{
int i,n,m,count=0,sum=0;
printf("Input n:");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
printf("Inputm:");
scanf("%d",&m);
if(m>0)
{
sum=sum+m;
count++;
}
else
{
break;
}
printf("sum=%d,count=%d\n",sum,count);
}
}
6.13 *include<stdio.h>

main()
{
int i,n,m,count=0,sum=0;
printf("Inputn:");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
printf("Inputm:");
scanf("%d",&m);
if(m>0||m<0)
{
sum=sum+m;
count++;
}
else
{
break;
}
printf("sum=%d,count=%d\n",sum,count);
}
}
6.14 *include<stdio.h>
main()
{
int *,y,z;
for(*=0;*<=17;*++)
{
for(y=0;y<=25;y++)
{
3**+2*y+z==50;
z=30-*-y;
if( 3**+2*y+z==50&&*+y+z==30)
printf("*=%d,y=%d,z=%d\n",*,y,z);
}
}
}
6.15 *include<stdio.h>
main()
{
int *,y;
for(*=0;*<=98;*++)
{
y=98-*;
2**+4*y==386;

if(*+y==98&&2**+4*y==386)
{
printf("*=%d,y=%d\n",*,y);
}
}
}
6.16 *include<stdio.h>
main()
{
int *,y,z;
for(*=0;*<=20;*++)
{
for(y=0;y<=33;y++)
{
3*y+5**+z/3.0==1;
z=1-*-y;
if (5**+3*y+z/3.0==1&&z+*+y==1)
{
printf("*=%d,y=%d,z=%d\n",*,y,z);
}
}
}
}
6.17 *include<stdio.h>
main()
{
int *,y,z;
for(*=1;*<=9;*++)
{
for(y=1;y<=17;y++)
{
10**+5*y+z==1;
z=50-*-y;
if( 10**+5*y+z==1&&*+y+z==50&&z>0)
{
printf("*=%d,y=%d,z=%d\n",*,y,z);
}
}
}
}
7.1 *include<stdio.h>
int Square(int i)
{
return i*i;

}
int main()
{
int i=0;
i=Square(i);
for( ;i<3;i++)
{
static int i=1;
i+=Square(i);
printf("%d,",i);
}
printf("%d\n",i);
return 0;
}
7.2 *include<stdio.h>
int hour,minute,second;
void update()
{
second++;
if(second==60)
{
second=0;
minute++;
}
if(minute==60)
{
minute=0;
hour++;
}
if(hour==24)
hour=0;
}
void display()
{
printf("%d,%d,%d\n",hour,minute,second);
}
void delay()
{
int t;
for(t=0;t<1;t++);
}
int main()
{
int i;
void updaye(),display(),delay();for(i=0;i<1;i++){
update();
display();
delay();
}
return 0;
}
7.3 *include<stdio.h>int GetMa*(int a,int b);int main()
{
int *,y,ma*;
printf("Input*,y:");scanf("%d,%d",&*,&y);
ma*=GetMa*(*,y);
printf("ma*=%d\n",ma*);return 0;
}
int GetMa*(int m,int n){
if(m>=n)
return m;
else
return n;
}
7.4 *include<stdio.h>int LCM(int n,int m);int main()
{
int a,b;
printf("Inputa,b:");scanf("%d,%d",&a,&b);
printf("%d\n",LCM(a,b));return 0;
}int LCM(int n,int m){
int *;
int find=0;
for(*=1;!find;*++){
if(*%n==0&&*%m==0)

find=1;
}
}
return *-1;
}
7.5 *include<stdio.h>long Fact(int n);
int main()
{
int m,a;
printf("Inputm:");
scanf("%d",&m);
for(a=1;a<=m;a++)
{
printf("%d!=%ld\n",a,Fact(a));
}
return 0;
}
long Fact(int n)
{
int i;
long result=1;
for(i=2;i<=n;i++)result*=i;
return result;
}
7.6 *include<stdio.h>long Fact(int n);
int main()
{
int m;
long ret;
printf("Inputm:");
scanf("%d",&m);
ret=Fact(m);
printf("ret=%d\n",ret);
return 0;
}
long Fact(int n)
{
int i;
long result=1,sum=0;
for(i=2;i<=n;i++)

result*=i;
sum=sum+result;
}
return sum;
}
7.7(1) *include<stdio.h>int Gcd(int a,int b);
int main()
{
int m,n;
printf("Inputm,n:");
scanf("%d,%d",&m,&n);
printf("%d\n",Gcd(m,n));
return 0;
}
int Gcd(int a,int b)
{
int t,min,find=0;
min=a<b"a:b;
t=min;
for(t=min;!find;t—)
{
a%t==0;
b%t==0;
if(a%t==0&&b%t==0)
return t;
}
find=1;
}
7.7(2) *include<stdio.h>int Gcd(int a,int b);
int main()
{
int m,n;
printf("Inputm,n:");
scanf("%d,%d",&m,&n);
printf("%d\n",Gcd(m,n));
return 0;
}
int Gcd(int a,int b)
{
int r,temp;
r=a%b;

if(r==0)
return b;
else
do(
temp=b;
b=r;
a=temp;
r=a%b;
}while(r!=0);
return b;
}
8.1(1) *include<stdio.h>
void Func(int *){
*=2;
}
int main()
{
int *=10;
Func(*);
printf("%d",*);
return 0;
}
8.1(2) *include<stdio.h>void Func(int b[]){
int j;
for(j=0;j<4;j++)
{
b[j]=j;
}
}
int main()
{
static int a[] = {5,6,7,8},i;
Func(a);
for(i=0;i<4;i++)
{
printf("%d",a[i]);
}return 0;
}
8.2(1) int PositiveNum(int a[],int n){

int i,count=0;
for(i=0;i<n;i++)
{
if(a[i]>0)
count++;
}
return 0;
}
8.2(2) void Fib(long f[],long n)
{
int i;f[0]=0;
f[1]=1;
for(i=2;i<n;i++)
{
f[i]=f[iT]+f[i-2];
}
}
8.2(3) *include<stdio.h>
int main()
{
int a[10],n,ma*,min,ma*Pos,minPos;
for(n=0;n<10;n++)
{
scanf("%d",&a[n]);
}
ma*=min=a[0];
ma*Pos=minPos=0;
for(n=0;n<10;n++)
{
if(a[n]>ma*)
{
ma*=a[n];
ma*Pos=n;
}
else if(a[n]<min)
{
min=a[n];
minPos=n;
}
}
printf("ma*=%d,pos=%d\n",ma*,ma*Pos);
printf("min=%d,pos=%d\n",min,minPos);
return 0;
}

8.3 void DivArray(int *pArray,int n){
int i;
for(i=0;i<n;i++)
{
pArray[i]/=pAttay[0];
}
}
8.4 *include<stdio.h>
*define N 40
int FailNum(int score[],int n);
void ReadScore(int score[],int n);int main(){
int score[N],n;
printf("Input n:");
scanf("%d",&n);
ReadScore(score,n);
FailNum(score,n);
printf("FailNum students are %d\n",FailNum(score,n));return 0;
}
int FailNum(int score[],int n)
{
int i,count=0;
for(i=0;i<n;i++)
{
if(score[i]<60)
count++;
}
return count;
}
void ReadScore(int score[],int n)
{int i;printf("Input score:");
for(i=0;i<n;i++)
{
scanf("%d",&score[i]);
}
}
8.5 *include<stdio.h>
*define N 40
int HighAver(int score[],int n);

int ReadScore(int score[]);
int main()
{
int score[N],n;
n=ReadScore(score);
printf("HighAver students are %d\n",HighAver(score,n));return 0;
}
int HighAver(int score[],int n)
{
int i,count=0,sum=0,aver;
for(i=0;i<n;i++)
{
sum=sum+score[i];
aver=sum/n;
}
for(i=0;i<n;i++)
{
if(score[i]>aver)
count++;
}
return count;
}
int ReadScore(int score[])
{
int i=-1;
do(
i++;
printf("Input score:");
scanf("%d",&score[i]);
}while(score[i]>=0);
return i;
}
8.6 *include<stdio.h>
*define N 40
int ReadScore(int score[],long num[]);
int FindMa*(int score[],long num[],int n);
int main()
{
int score[N],n,ma*,num,t;
long num[N];
t=FindMa*(score,n);
ma*=score[t];
num=num[t];

printf("ma*=%d,num=%d\n",ma*,num);
return 0;
}
int ReadScore(int score[],long num[]){
int i=-1;
do(
i++;
printf("Input student's ID and score:");
scanf("%ld%d",&num[i],&score[i]);
}while(num[i]>0&&score[i]>=0);return i;
}
int FindMa*(int score[],long num[],int n)
{
int ma*,i;
ma*=score[0];
for(i=1;i<n;i++)
{
if(score[i]>ma*)ma*=score[i];
}return i;
}
8.7 *include<stdio.h>
*define N 40
int Read(int a[]);
int ChangeArry(int a[],int n);
int main()
{
int a[N],n;
printf("%d\n",ChangeArry(a,n));
return 0;
}
int Read(int a[])
{
int i;
for(i=0;i<9;i++)
{
printf("Input a:");
scanf("%d",&a[i]);
return i;
}
int ChangeArry(int a[],int n)

int ma*,min,i,ma*pos,minpos,term;
ma*=min=score[0];
for(i=1;i<n;i++)
{
if(a[i]>ma*)ma*=score[i];
ma*pos=n;
else(a[i]<min)
min=a[i];
minpos=n;
temp=ma*pos;
ma*pos=minpos;
minpos=temp;
}return a[i];
}
8.10 *include<stdio.h>
*define N 5
void main(){
int a[N][N];
int sum = 0;
int i, j;
printf谓输入一个%d*%d的矩阵\n",N,N);
for(i = 0; i < N; i++)
{
for(j = 0; j < N; j++)
{
scanf("%d",&a[i][j]);
}
}
for(i = 0; i < N; i++)
{
for(j = 0; j < N; j++)
{
if(i == j || i + j == N - 1)sum=sum+a[i][j];
}
}
printf对角线元素之和为：％d\n",sum);
}
8.11 *include<stdio.h>
*define N 2

*define M 3void main(){
int a[N][M],b[N][M];
int i,j,sum1=0,sum2=0,sum=0;
prints# 输入一个 %d*%d 的矩阵\n",N,M);
for(i = 0; i<N; i++)
{
for(j = 0; j< M; j++)
{
scanf("%d",&a[i][j]);sum1=sum1+a[i][j];
}
}
printf谓输入一个%d*%d的矩阵\n",N,M);
for(i = 0; i <N; i++)
{
for(j = 0; j <M; j++)
{
scanf("%d",&b[i][j]);sum2=sum2+a[i][j];
}
}
sum=sum1+sum2;
printf("sum=%d\n",sum);
}
8.12 *include<stdio.h>
*define N 7
void YangHui(int a[N][N],int n);void main(){
int i,j,n,b[N][N];
printf("Input n: