S1E16：拾遗 | 课后测试题及答案

tanghuanfe

么么哒小甲鱼

村名阿钊

I love FishC.com!

piaoycws

12

Vinci_ovo

over

junyue

坚持胜利

lulukay

2

就是怂

1

月蚀

难受

飘逸的光头

看答案

cage233

0.10
1.0
2.5
3.出错

欣然_coder

.

KulobaY_xiao

0.10次
1.10次
2.c,b,a
3.a=4,b=5,c=9
4.x>=0?z=x:z=0-x;
5.

夜雨闻铃

看看

夜雨闻铃

看看

xdlcj

答案

ietar

0
just 10

1
...没进循环啊

2
a

3
b=3,c=8 b=4 c=9 b=5 a=14

4
void main(){
        float x,z;
        printf("x=:");
        scanf("%f",&x);
        z = x>0?x:-x;
        printf("z=%f",z);
}

5
A

1. if (size > 12)
   
2. {
   
3.         cost = cost * 1.05;
   
4.         flag = 2;
   
5. }
   
6. bill = cost * flag;
   

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B

1. if (ibex > 14)
   
2. {
   
3.         sheds = 3;
   
4. }
   
5. else{
   
6.         sheds = 2;
   
7. }
   
8. help = 2 * sheds;
   

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C

1. scanf("%d", &score);
   
2. while (score >= 0)
   
3. {
   
4.         count++;
   
5.         scanf("%d", &score);
   
6. }
   
7. printf("count = %d\n", count);
   

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0

1. #include <stdio.h>
   
2. 
   
3. void main(){
   
4.         int year;
   
5.         const float i1=0.1;
   
6.         const float i2=0.05;
   
7.         double xjy=10000, heiye=10000;
   
8.         for(year=0;heiye<=xjy;year++){
   
9.                 xjy += 10000*i1;
   
10.                 heiye *= (1+i2);
    
11.         }
    
12.         printf("after %d years, heiye gets more than xjy!\n",year);
    
13.         printf("xjy:%.2f\nheiye:%.2f",xjy,heiye);
    
14. }
    

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1

1. #include <stdio.h>
   
2. 
   
3. void main(){
   
4.         int year;
   
5.         double base = 4000000;
   
6.         for(year=0;base>=0;year++){
   
7.                 base -= 500000;
   
8.                 base *= 1.08;
   
9.         }
   
10.         printf("after %d years, sjy sucks!\n",year);
    
11. }

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2

1. #include <stdio.h>
   
2. #include <math.h>
   
3. 
   
4. void main(){
   
5.         double qpi=0,each=1;
   
6.         int n,count=0;
   
7.         for(n=1;fabs(each)>=1e-8;n++){
   
8.                 each = pow(-1,(n+1))/(2*n-1);
   
9.                 qpi += each;
   
10.                 count += 1;
    
11.         }
    
12.         printf("pi=%.7f\ncount=%d",4*qpi,count);
    
13. }

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这tm循环了5000万零1次 怪不得这么慢

3
92736 初项是2 2的fib嘛

1. #include <stdio.h>
   
2. #include <math.h>
   
3. 
   
4. void main(){
   
5.         int a1 = 2, a2=2, limit = 24, temp;
   
6.         // n1=2, n2=2, n3=n2+n1=4, n4=n3+n2=6, n5=n4+n3=10;
   
7.         for(int i=3;i<=limit;i++){
   
8.                 temp = a2;
   
9.                 a2 = a1+a2;
   
10.                 a1 = temp;
    
11.         }
    
12.         printf("sum=%d",a2);
    
13. }

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啊是‘对‘ 结果除以2就行了 46368

yjh19961228

3

w7813396

我爱你小甲鱼

996982937

0.100个
1.9个
2.c=5;b=c;a=b;
3.a=3
b=5
c=9
4.z=x?x>=0:z=-x
5.
A.
if(size>12)
{
     cost=cost*1.05;
     flag=2;
}

    bill=cost*flag;
B.
if (ibex > 14)
{
      sheds = 3;
}
sheds = 2;
help = 2 * sheds;
C.

if (score < 0)
{
     stage2: printf("count = %d\n", count);
}
count++;
scanf("%d", &score);

重楼倚城隅

1