Operation 2020.11.7-8

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《 The first 2 Chapter 1-8 topic 》

1. Write a program , Call once printf( function , Print your first and last names on one line . Call again printf( function , Print your first name and last name on two lines . then , Call twice more printf( function , Print your first and last names on one line . The output should be as follows ( Of course, change the content of the example to your name )：

#include<stdio.h>
#include<stdlib.h>
#define NAME"tiantian"
#define SURNAME"sun"
int main(void)
{
	printf("%s %s\n",NAME,SURNAME);
	printf("%s\n%s\n",NAME,SURNAME);
	printf("%s",NAME);
	printf("%s\n",SURNAME);
	system("pause");
	return 0;
}

2. Write a program , Print your name and address

#include<stdio.h>
#include<stdlib.h>
#define NAME"suntiantian"
#define ADDRESS"NO.67 qianshuiwan,Taizhou"
int main(void)
{
	printf("%s\n",NAME);
	printf("%s\n",ADDRESS);
	system("pause");
	return 0;
}

3. Write a program , Convert your age to days , And show age and days , There's no need to think about leap years .

#include<stdio.h>
#include<stdlib.h>
#define DAYS_PER_YEAR 365
int main(void)
{
	int age,days;
	age = 19;
	days=age*DAYS_PER_YEAR;
	printf("You age is %d,and It is %d days.\n",age,days);
	system("pause");
	return 0;
}

4,4. Write a program , Generate the following output
 For hes a jolly good fellow!
 For he 's a jolly good fellow!
 For he s a jolly good fellow!
 Which nobody can deny!
except mainO Out of function , The program also calls two custom functions ： A group called y jolly, Used before printing 3 strip
news , Call to print one at a time ; Another function is called deny, Print the last message

#include<stdio.h>
#include<stdlib.h>
	int jolly(void);
	int deny(void);
	int main(void){
	jolly();
	jolly();
	jolly();
	deny();
	system("pause");
	return 0;
	}
	int jolly(void){
		printf("For he's a jolly good fellow!\n");
		return 0;
	}
	int deny(void){
		printf("Which nobody can deny!\n");
		return 0;
	}

5.5. Write a program , Generate the following output .
 Brazil, Russia, India, China
 India, China,

Brazil, Russia
except main Out of function , The program also calls two custom functions ： A group called br（）, Call print once
 ”Brazil, Russia“;
The other one is called ic（）, Call print once "india,China”. Other functions are in mainO function
To realize .

6. Write a program , Create an integer variable toes, And will toes Set to 10, The program also calculates toes Double and toes The square of . The program should print 3 It's worth , And describe them separately to show the difference .

#include<stdio.h>
#include<stdlib.h>
	int main(void){
	int toes;
	toes-10;
	printf("The Variable toes = %d.\n",toes);
	printf("double toes = %d.\n",2*toes); 
	printf("toes' square = %d.\n",toes*toes);
	system("pause");
	return 0;
	}