标签：main scanf 邮电大学 C语言 课程 printf input include c2

C语言课程训练系统题-基础习题

• • • 1.爱因斯坦
    • 2.输出两数最大值
    • 3.输出两数商
    • 4.12a4.2
    • 5判断3个数是否相等
    • 6输入一个数，逆序输出这个数
    • 7求三角形面积
    • 8四则运算
    • 9求2/1,3/2,5/3,8/5,13/8,21/13,.....前20项之和
    • 10小写转大写
    • 11大写转小写
    • 12输入两数求商
    • 13计算心跳次数
    • 14输出指定文字
    • 15温度转换
    • 16体重指数
    • 17大象喝水
    • 18输出大写字母，所占内存大小
    • 19改错12a4.
    • 20输出N个阶乘

1.爱因斯坦

#include <stdio.h>
main()
{
	int  x,find=1;
	x=0;
    do{
        x++;
       if(x%2==1&&x%3==2&&x%5==4&&x%6==5&&x%7==0)find=0; 
    }while (find);  
    printf("x=%d\n",x);
}

2.输出两数最大值

#include<stdio.h>
main()
{
	int a,b,max;
	printf("Input a, b:");
	scanf("%d,%d",&a,&b);
	if (a>b) max = a;
	if (a<=b) max = b;
	printf("max = %d\n",max);
}

3.输出两数商

#include <stdio.h>
main()
{
    int a,b;
	double c;
	printf("Input two integers:");
    scanf("%d%d",&a,&b);
    c = a/b;
    printf("The quotient of a and b is :%.f",c);
}

4.12a4.2

#include <stdio.h>
main()
{
    int i;
    char ch;
    float f;
    printf("Please input:\n");
    scanf("%d%c%f",&i,&ch,&f);
    printf("The input integer is : %-3d\nThe input character is : %c\n",i,ch);
    printf("The input float is : %f",f);
}

5判断3个数是否相等

#include <stdio.h>
 main()
{
    int a,b,c;
	scanf("%d%d%d",&a,&b,&c);
    if (a==b&&a==c)
        printf("The three number is equal!!!");
    else
        printf("The three number isn't equal!!!");
}

6输入一个数，逆序输出这个数

#include<stdio.h>
main()
{
	int x,a,b,c,d,y;
	printf("Input x:");
	scanf("%d",&x);
	if(x<0)
		d=(-x);
	else
		d=x;
	a=d/100;
	b=(d-a*100)/10;
	c=d%10;
	y=a+b*10+c*100;
	printf("y = %d\n",y);
}

7求三角形面积

#include<stdio.h>
#include<math.h>
main()
{
	float a,b,c,s,area;
	printf("Enter 3 floats");
	scanf("%f,%f,%f",&a,&b,&c);
	s=(a+b+c)/2;
	area=(float)sqrt(s*(s-a)*(s-b)*(s-c));
	printf("area=%.2f\n",area);
}

8四则运算

#include<stdio.h>
#include<math.h>
main()
{
	float a,b;
	char op;
	printf("Please enter the expression:\n");
	scanf("%f %c%f",&a,&op,&b);
	switch(op)
	{
	case'+':printf("%f + %f = %f \n",a,b,a+b);break;
	case'-':printf("%f - %f = %f \n",a,b,a-b);break;
	case'*':printf("%f * %f = %f \n",a,b,a*b);break;
	case'^':printf("%f ^ %f = %f \n",a,b,pow(a,b));break;
	case'/':if(b==0)
					printf("Division by zero!\n");
		else
			printf("%f / %f = %f \n",a,b,a/b);break;
	default:printf("Invalid operator! \n");
	}
}

9求2/1,3/2,5/3,8/5,13/8,21/13,…前20项之和

#include <stdio.h>
main()
{
    double i, s1 = 2, s2 = 1;
    float x, sum = 0;
	for (i = 1; i <= 20; i++)
    {
        sum +=( s1 / s2);
        x = s1;
        s1 += s2;
        s2 = x;
    }
    printf("sum = %f\n", sum);
}

10小写转大写

#include<stdio.h>
main()
{

	char c1,c2;
	c1=getchar();
	c2=c1-32;
	printf("%c,%d\n",c2,c2);
}

11大写转小写

#include<stdio.h>
main()
{
	char c1,c2;printf("Press a key and then press Enter:");
	c1=getchar();
	c2=c1+32;
	printf("%c\n",c2);
}

12输入两数求商

#include <stdio.h>
main()
{
    int a,b,c;
	printf("Enter two numbers");
	scanf("%d%d",&a,&b);
	if(b==0)
		printf("cannot divide by zero.\n");
	else
		c=a/b;
		printf("%d",c);
}

13计算心跳次数

#include<stdio.h>
#include<math.h>
main()
{
	int n,c;
	printf("Please input your age: ");
	scanf("%d",&n);
	c=n*365*24*60*75;
	printf("The heart beats in your life: %d",c);
}

14输出指定文字

#include<stdio.h>
main()
{
	printf("*****************************\n");
	printf("* C programming           　*\n");
	printf("* Hello world!      　　　　*\n");
	printf("*****************************\n");
}

15温度转换

#include<stdio.h>
#include<math.h>
main()
{
	double t,T;
	printf("Please input fahr: ");
	scanf("%lf",&t);
	T=5.0*(t-32.0)/9.0;
	printf("The cels is: %.2f",T);
}

#include<stdio.h>
#include<math.h>
main()
{
	double t,T;
	printf("Please input cels: ");
	scanf("%lf",&t);
	T=t*9.0/5.0+32.0;
	printf("The fahr is: %.2f",T);
}

16体重指数

#include<stdio.h>
#include<math.h>
main()
{
	int w,h,weight;
	double height,t;
	printf("Input weight, height:\n");
	scanf("%d,%d",&w,&h);
	weight=w*2;
	height=h/100.00;
	t=w/(height*height);
	printf("weight=%d\n",weight);
	printf("height=%.2f\n",height);
	printf("t=%.2f\n",t);
}

17大象喝水

#include<stdio.h>
#include<math.h>
main()
{
	int h,r,n;
	float PAI=3.14159;
	scanf("%d,%d",&h,&r);
	n=20000/(h*r*r*PAI);
	printf("please input the height and the radius:\n%d",n+1);
}

18输出大写字母，所占内存大小

#include<stdio.h>
main()
{
	char c1,c2;
	printf("please input a lowercase:\n");
	c1=getchar();
	c2=c1-32;
	printf("%c %d %d\n",c2,c2,sizeof(c2));
}

19改错12a4.

#include <stdio.h>
main()
{
    int i;
    char ch;
    float f;
    printf("Please input:\n");
    scanf("%d%c%f",&i,&ch,&f);
    printf("The input integer is : %d \nThe input character is : %c\n", i, ch);
    printf("The input float is : %f", f);
}

20输出N个阶乘

#include<stdio.h>
#include<math.h>	
main()
{
	int i,n;
	long p=1;
	printf("Please enter n：");
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		p=p*i;
		printf("%d! = %ld\n",i,p);
	}
}

注：其余39道基础题在我资源文档中。

标签：main,scanf,邮电大学,C语言,课程,printf,input,include,c2
来源： https://blog.csdn.net/pitepa/article/details/111743776

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