C•exercises

catalogue

• 基础
• 题目1：计算并输出矩形的面积和周长
• 题目2：数字位数的分离与求和
• 题目3：单位转换-英寸到厘米
• 题目4：整数溢出验证

基础

🩷visual studio新建C语言文件

🩷如果显示无配置，就双击文件夹里的.sln文件，要先在visual studio里打开项目所在文件夹哦

题目1：计算并输出矩形的面积和周长

#include <stdio.h>

int main() {
	float chang = 0;
	float kuan = 0;
	printf("please input the chang and kuan orderly(split by space):");
	scanf_s("%f %f", &chang, &kuan); //scanf_s中变量加&
	float mianji = chang * kuan;
	float zhouchang = 2.0 * (chang + kuan); 
	printf("mianji is %0.2f, zhouchang is %0.2f", mianji, zhouchang); //0.2f保留两位小数，printf中变量直接写名，不加&
	return 0;
}

题目2：数字位数的分离与求和

#include <stdio.h>

int main() {
	int num,ge,shi,bai,total,mutiple;
	printf("please input a three-digit number:");
	scanf_s("%d", &num);
	if (num > 100 && num < 999) { //判断方法简单，同时满足用&&哦
		bai = num / 100;
		shi = (num / 10) % 10;
		ge = (num % 100) % 10;
		total = bai + shi + ge;
		mutiple = bai * shi * ge;
		printf("the sum of the digits is %d\n", total);
		printf("the product of the digits is %d\n", mutiple);
	}
	else {
		printf("this number is not a three-digit number!\n");
		return 0; //结束程序，避免错误计算
	}
	return 0;
}

题目3：单位转换-英寸到厘米

#include <stdio.h>

int main() {
	float inches = 0;
	printf("请输入一个以英寸为单位的长度值：");
	scanf_s("%f", &inches);
	float centimeters = inches * 2.54;
	printf("%.2f英寸转化为厘米为%.2f", inches, centimeters);
	return 0;
}

题目4：整数溢出验证

#include <stdio.h>
#include <limits.h>  // 包含 INT_MAX 的定义，注意别写错，要写C的，c++的库名是<climits>，会导致使用c++编译器

int main() {
	int a = 0;
	int b = 0;
	printf("请输入两个较大整数，用空格分隔：");
	scanf_s("%d %d", &a, &b); //记得加_s
	printf("INT_MAX = %d\n", INT_MAX);
	printf("a + b = %d\n", a + b);
	printf("a * b = %d\n", a * b);
	return 0;
}