C Primer Plus第三章编程练习

1.通过试验(即编写带有此类问题的程序)观察系统如何处理整数上溢、浮点数上溢和浮点数下溢的情况。


2.编写一个程序,要求提示输入一个ASCII码值(如,66),然后打印输入的字符。

#include<stdio.h>
int main(void)
{
	int i;
	printf("Please enter a number:__\b\b");
	scanf("%d", &i);
	getchar();
	printf("The character of %d is %c\n", i, i);
	return 0;
}

Output:


3.编写一个程序,发出一声警报,然后打印下面的文本:

Startled by the sudden sound, Sally shouted,

"By the Great Pumpkin, what was that!"

#include<stdio.h>
int main()
{
	printf("\aStartled by the sudden sound, Sally shouted,\n");
	printf("\"By the Great Pumpkin, what was that!\"\n");
	return 0;
}

Output:


4.编写一个程序,读取一个浮点数,先打印成小数点形式,再打印成指数形式。然后,如果系统支持,再打印成p记数法(即十六进制记数法)。按以下格式输出(实际显示的指数位数因系统而异):

Enter a floating-point value: 64.25

fixed-point notation: 64.250000

exponential notation: 6.425000e+01

p notation: 0x1.01p+6

#include<stdio.h>
int main(void)
{
	float a;
	printf("Enter a floating-point value:");
	scanf("%f",&a);
	getchar();
	printf("fixed-point notation:%f\n",a);
	printf("exponential notation:%e\n",a);
	printf("p notation:%a\n",a);
	return 0;
}

Output:


5.一年大约有3.156*10^7秒。编写一个程序,提示用户输入年龄,然后显示该年龄对应的秒数。

#include<stdio.h>
int main(void)
{
	int age;
	float year = 3.156e7;
	printf("Enter your age:");
	scanf("%d", &age);
	getchar();
	printf("The second of your age is:%e\n", age*year);
	return 0;
}

Output:


6.1个水分子的质量约为3.0*10^(-23)克。一夸脱水大约是950克。编写一个程序,提示用户输入水的夸脱数,并显示水分子的数量。

#include<stdio.h>
int main(void)
{
	int quart;
	printf("Enter the number of water in quart:");
	scanf("%d", &quart);
	getchar();
	printf("The number of water molecules is:%e\n", quart * 950 / 3.0e-23);
	return 0;
}

Output:


7.1英寸相当于2.54厘米。编写一个程序,提示用户输入身高(/英寸),然后以厘米为单位显示身高。

#include<stdio.h>
int main(void)
{
	float h;
	printf("Enter your height in inch:");
	scanf("%f",&h);
	getchar();
	printf("Your height in centimeter is:%.2f\n", h*2.54);
	return 0;
}

 Output:


8.在美国的体积测量系统中,1品脱等于2杯,1杯等于8盎司,1盎司等于2大汤勺,1大汤勺等于3茶勺。编写一个程序,提示用户输入杯数,并以品脱、盎司、汤勺、茶勺为单位显示等价容量。思考对于该程序,为何使用浮点类型比整数类型更合适?

#include<stdio.h>
int main(void)
{
	float i;
	printf("Enter the number of cup:");
	scanf("%f",&i);
	getchar();
	printf("%.2f cup is equal to %.2f pint\n",i,i/2);
	printf("%.2f cup is equal to %.2f ounce\n",i,i*8);
	printf("%.2f cup is equal to %.2f soup ladle\n",i,i*8*2);
	printf("%.2f cup is equal to %.2f tea ladle\n",i,i*8*2*3);
	return 0;
}

Output:

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转载自blog.csdn.net/zwmoooooo/article/details/81711941