用c语言 x = float(input("请输入x值："))if x < 1: y = x + 1elif x < 10: y = 2 * x + 5else: y = x ** 2 + 8print("在 x = {} 时，y = {}".format(x, y))

C语言中没有 `input()` 函数，可以使用 `scanf()` 函数来实现输入。下面是一个类似于 Python 代码的 C 语言代码：

#include <stdio.h>
#include <math.h>

int main() {
    float x, y;
    printf("请输入x值：");
    scanf("%f", &x);
    if (x < 1) {
        y = x + 1;
    } else if (x < 10) {
        y = 2 * x + 5;
    } else {
        y = pow(x, 2) + 8;
    }
    printf("在 x = %.2f 时，y = %.2f\n", x, y);
    return 0;
}

在这个代码中，首先使用 `printf()` 函数来输出提示信息，然后使用 `scanf()` 函数来读取用户输入的 `x` 值。接下来使用 `if-else` 语句来判断 `x` 的取值范围，并计算出对应的 `y` 值。最后使用 `printf()` 函数来输出结果。其中，`%.2f` 表示输出浮点数时保留两位小数。

相关问题

用Python代码设计一套学生成绩管理系 统(学生人数至少为10人)，要求满足以下要求: 程序运行后，需要显示系统主菜单: --主菜单------- 1、 录入学生信息 查找学生信息 2- 3、 删除学生信息 4、 修改学生信息 5、 学生成绩统计 6 退出系统 按照主菜单内容，对学生成绩进行相关操作并给出对应显示， 这里给出示例:请选择功能:1请输入学生学号:请输入学生姓名:请输入学生高数成绩: 请输入学生英语成绩: 请输入学生Python 成绩: 请输入学生C语言成绩:请输入学生机器学习成绩: 录入完毕?[YN:(输入Y，则询问下一个选择的功能;输入 N，则开始输入下一个学生的信息和成绩。) 在功能2下，则可以根据学生姓名或者是学生学号查找学生信息， 并将其所有成绩进行输出显示。 在功能5下，需要进行: a)计算每个学生所有课程的总成绩和平均分， b)每一门课程中所有学生的平均分 c) 将所有汇总信息保存到一个.csv文件中

以下是基于Python的学生成绩管理系统的代码实现：

import csv

class Student:
    def __init__(self, id, name, math_score, eng_score, py_score, c_score, ml_score):
        self.id = id
        self.name = name
        self.math_score = math_score
        self.eng_score = eng_score
        self.py_score = py_score
        self.c_score = c_score
        self.ml_score = ml_score

    def get_total_score(self):
        return self.math_score + self.eng_score + self.py_score + self.c_score + self.ml_score

    def get_avg_score(self):
        return self.get_total_score() / 5

class Scoresheet:
    def __init__(self):
        self.students = []

    def add_student(self, student):
        self.students.append(student)

    def search_student_by_id(self, id):
        for student in self.students:
            if student.id == id:
                return student
        return None

    def search_student_by_name(self, name):
        for student in self.students:
            if student.name == name:
                return student
        return None

    def remove_student_by_id(self, id):
        for student in self.students:
            if student.id == id:
                self.students.remove(student)
                return True
        return False

    def modify_student_by_id(self, id, name, math_score, eng_score, py_score, c_score, ml_score):
        for student in self.students:
            if student.id == id:
                student.name = name
                student.math_score = math_score
                student.eng_score = eng_score
                student.py_score = py_score
                student.c_score = c_score
                student.ml_score = ml_score
                return True
        return False

    def get_total_avg_score(self):
        total_score = 0
        for student in self.students:
            total_score += student.get_total_score()
        return total_score / len(self.students)

    def get_math_avg_score(self):
        math_score = 0
        for student in self.students:
            math_score += student.math_score
        return math_score / len(self.students)

    def get_eng_avg_score(self):
        eng_score = 0
        for student in self.students:
            eng_score += student.eng_score
        return eng_score / len(self.students)

    def get_py_avg_score(self):
        py_score = 0
        for student in self.students:
            py_score += student.py_score
        return py_score / len(self.students)

    def get_c_avg_score(self):
        c_score = 0
        for student in self.students:
            c_score += student.c_score
        return c_score / len(self.students)

    def get_ml_avg_score(self):
        ml_score = 0
        for student in self.students:
            ml_score += student.ml_score
        return ml_score / len(self.students)

    def export_to_csv(self, filename):
        with open(filename, 'w', newline='') as csvfile:
            writer = csv.writer(csvfile)
            writer.writerow(['学号', '姓名', '高数成绩', '英语成绩', 'Python成绩', 'C语言成绩', '机器学习成绩'])
            for student in self.students:
                writer.writerow([student.id, student.name, student.math_score, student.eng_score, student.py_score, student.c_score, student.ml_score])

def get_input(prompt, input_type=None):
    while True:
        try:
            if input_type:
                value = input_type(input(prompt))
            else:
                value = input(prompt)
            return value
        except:
            print('输入的数据类型不正确，请重新输入！')

scoresheet = Scoresheet()

while True:
    print('---主菜单---')
    print('1、录入学生信息')
    print('2、查找学生信息')
    print('3、删除学生信息')
    print('4、修改学生信息')
    print('5、学生成绩统计')
    print('6、退出系统')
    choice = get_input('请选择功能：', int)

    if choice == 1:
        while True:
            id = get_input('请输入学生学号：')
            name = get_input('请输入学生姓名：')
            math_score = get_input('请输入学生高数成绩：', float)
            eng_score = get_input('请输入学生英语成绩：', float)
            py_score = get_input('请输入学生Python成绩：', float)
            c_score = get_input('请输入学生C语言成绩：', float)
            ml_score = get_input('请输入学生机器学习成绩：', float)
            student = Student(id, name, math_score, eng_score, py_score, c_score, ml_score)
            scoresheet.add_student(student)
            is_finished = input('录入完毕？[Y/N]：')
            if is_finished.lower() == 'y':
                break

    elif choice == 2:
        while True:
            search_type = get_input('请选择查找类型（1-学号，2-姓名）：', int)
            if search_type == 1:
                id = get_input('请输入要查找的学生学号：')
                student = scoresheet.search_student_by_id(id)
                if student:
                    print(f'学号：{student.id}，姓名：{student.name}，高数成绩：{student.math_score}，英语成绩：{student.eng_score}，Python成绩：{student.py_score}，C语言成绩：{student.c_score}，机器学习成绩：{student.ml_score}')
                else:
                    print('未找到该学生信息！')
            elif search_type == 2:
                name = get_input('请输入要查找的学生姓名：')
                student = scoresheet.search_student_by_name(name)
                if student:
                    print(f'学号：{student.id}，姓名：{student.name}，高数成绩：{student.math_score}，英语成绩：{student.eng_score}，Python成绩：{student.py_score}，C语言成绩：{student.c_score}，机器学习成绩：{student.ml_score}')
                else:
                    print('未找到该学生信息！')
            else:
                print('输入的查找类型不正确，请重新输入！')
            is_continue = input('是否继续查找？[Y/N]：')
            if is_continue.lower() != 'y':
                break

    elif choice == 3:
        while True:
            id = get_input('请输入要删除的学生学号：')
            if scoresheet.remove_student_by_id(id):
                print('删除成功！')
            else:
                print('未找到该学生信息！')
            is_continue = input('是否继续删除？[Y/N]：')
            if is_continue.lower() != 'y':
                break

    elif choice == 4:
        while True:
            id = get_input('请输入要修改的学生学号：')
            name = get_input('请输入学生姓名：')
            math_score = get_input('请输入学生高数成绩：', float)
            eng_score = get_input('请输入学生英语成绩：', float)
            py_score = get_input('请输入学生Python成绩：', float)
            c_score = get_input('请输入学生C语言成绩：', float)
            ml_score = get_input('请输入学生机器学习成绩：', float)
            if scoresheet.modify_student_by_id(id, name, math_score, eng_score, py_score, c_score, ml_score):
                print('修改成功！')
            else:
                print('未找到该学生信息！')
            is_continue = input('是否继续修改？[Y/N]：')
            if is_continue.lower() != 'y':
                break

    elif choice == 5:
        total_avg_score = scoresheet.get_total_avg_score()
        math_avg_score = scoresheet.get_math_avg_score()
        eng_avg_score = scoresheet.get_eng_avg_score()
        py_avg_score = scoresheet.get_py_avg_score()
        c_avg_score = scoresheet.get_c_avg_score()
        ml_avg_score = scoresheet.get_ml_avg_score()
        print(f'所有学生的总平均分：{total_avg_score:.2f}')
        print(f'高数的平均分：{math_avg_score:.2f}')
        print(f'英语的平均分：{eng_avg_score:.2f}')
        print(f'Python的平均分：{py_avg_score:.2f}')
        print(f'C语言的平均分：{c_avg_score:.2f}')
        print(f'机器学习的平均分：{ml_avg_score:.2f}')
        filename = get_input('请输入导出的文件名：')
        scoresheet.export_to_csv(filename)
        print(f'成绩已导出到{filename}文件中！')

    elif choice == 6:
        print('谢谢使用！')
        break

    else:
        print('输入的菜单编号不正确，请重新输入！')

将下面c语言代码改为python代码 #include<stdio.h> #include<stdlib.h> struct PROCESS { char PROCESS_NAME[10]; int atime; int rtime; int ttime; int X; float Response_ratio; }; int main() { struct PROCESS p[3]; for (int i=0;i<3;i++) { scanf("%s %d %d",&p[i].PROCESS_NAME,&p[i].atime,&p[i].rtime); p[i].X=i+1; } struct PROCESS temp; int nowtime=p[0].atime; int sign=0; int flag=0; int m=0; int n=0; for(int i=1;i<3;i++) { if(p[i].atime==nowtime) { if(p[i].rtime<p[sign].rtime) { sign=i; nowtime=p[i].atime; temp=p[i]; p[i]=p[0]; p[0]=temp; } } else if(p[i].atime<nowtime) { sign=i; nowtime=p[i].atime; temp=p[i]; p[i]=p[0]; p[0]=temp; } } while (1) { if(p[m].atime>=n) { p[m].ttime=p[m].rtime; n=p[m].atime+p[m].rtime; } else { p[m].ttime=p[m].rtime+n-p[m].atime; n+=p[m].rtime; } for(int i=1;i<3;i++) { p[i].Response_ratio=(float)(n-p[i].atime)/p[i].rtime; } m++; if(m==3) { break; } if(flag==0) { if(p[1].Response_ratio>=p[2].Response_ratio) { if(p[1].Response_ratio==p[2].Response_ratio) { if(p[1].X>p[2].X) { temp=p[1]; p[1]=p[2]; p[2]=temp; } } } else { temp=p[1]; p[1]=p[2]; p[2]=temp; } flag=1; } } for(int i=0;i<2;i++) { for(int j=1;j<3;j++) { if(p[i].X>p[j].X) { temp=p[i]; p[i]=p[j]; p[j]=temp; } } } for(int i=0;i<3;i++) { printf("%d ",p[i].ttime); } }

以下是将C语言代码转换为Python代码后的结果：

class Process:
    def __init__(self):
        self.PROCESS_NAME = ""
        self.atime = 0
        self.rtime = 0
        self.ttime = 0
        self.X = 0
        self.Response_ratio = 0.0

p = [Process() for i in range(3)]
for i in range(3):
    p[i].PROCESS_NAME, p[i].atime, p[i].rtime = input().split()
    p[i].atime = int(p[i].atime)
    p[i].rtime = int(p[i].rtime)
    p[i].X = i + 1

temp = Process()
nowtime = p[0].atime
sign = 0
flag = 0
m = 0
n = 0

for i in range(1, 3):
    if p[i].atime == nowtime:
        if p[i].rtime < p[sign].rtime:
            sign = i
            nowtime = p[i].atime
            temp = p[i]
            p[i] = p[0]
            p[0] = temp
    elif p[i].atime < nowtime:
        sign = i
        nowtime = p[i].atime
        temp = p[i]
        p[i] = p[0]
        p[0] = temp

while True:
    if p[m].atime >= n:
        p[m].ttime = p[m].rtime
        n = p[m].atime + p[m].rtime
    else:
        p[m].ttime = p[m].rtime + n - p[m].atime
        n += p[m].rtime
    for i in range(1, 3):
        p[i].Response_ratio = (n - p[i].atime) / p[i].rtime
    m += 1
    if m == 3:
        break
    if flag == 0:
        if p[1].Response_ratio >= p[2].Response_ratio:
            if p[1].Response_ratio == p[2].Response_ratio:
                if p[1].X > p[2].X:
                    temp = p[1]
                    p[1] = p[2]
                    p[2] = temp
        else:
            temp = p[1]
            p[1] = p[2]
            p[2] = temp
        flag = 1

for i in range(2):
    for j in range(1, 3):
        if p[i].X > p[j].X:
            temp = p[i]
            p[i] = p[j]
            p[j] = temp

for i in range(3):
    print(p[i].ttime, end=' ')