学完C语言之后,我就去阅读《C Primer Plus》这本经典的C语言书籍,对每一章的编程练习题都做了相关的解答,仅仅代表着我个人的解答思路,如有错误,请各位大佬帮忙点出!
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。
#include <stdio.h>
#include <float.h>
#include <limits.h>
int main(void)
{
int big_int = 2147483647;
float big_float = 3.4e38;
float small_flaot = 10.0 / 3;
printf("The big int data is %d\n", big_int + 1);
printf("The big float data is %f\n", big_float + 1);
printf("The big float data is %f\n", small_flaot);
printf("The Max float data is %f\n", FLT_MAX);
printf("The Max int data is %d\n", INT_MAX);
return 0;
}
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 input = '0';
printf("请输入一个ASILL码值:");
scanf("%d", &input);
printf("input = %c\n", input);
return 0;
}
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(void)
{
printf("\a");
printf("Startled by the sudden sound, Sally shouted,\n");
printf("\"By the Great Pumpkin, what was that!\"\n");
return 0;
}
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 output = 64.25;
printf("Enter a floating-point value:%.2f\n", output);
printf("fixed-point notation:%f\n", output);
printf("exponential notation:%e\n", output);
printf("p notation: %.2a\n", output);
return 0;
}
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>
#define YEAR_TO_SECOND 3.156e7
int main(void)
{
int age = 0;
printf("请输入你的年龄:");
scanf("%d", &age);
printf("该年龄对应的秒数位:%f\n", age * YEAR_TO_SECOND);
return 0;
}
6.1个水分子的质量约为3.0×10 −23克。1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>
#define MASS_PER_MOLE 3.0e-23
#define MASS_PER_QUART 950
int main(void)
{
float quart = 0.0;
printf("请输入水的夸脱数:");
scanf("%f", &quart);
printf("水分子的数量为:%f\n", quart * MASS_PER_QUART / MASS_PER_MOLE);
return 0;
}
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>
#define INCH_TO_CM 2.54
int main(void)
{
float inch = 0.0;
printf("请输入身高:");
scanf("%f", &inch);
printf("身高为 %.3f cm\n", inch * INCH_TO_CM);
return 0;
}
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>
#define PINT_CUP 2
#define CUP_OUNCE 8
#define OUNCE_SPOON 2
#define SPOON_TEA 3
int main(void)
{
float pint, cup, ounce, spoon, tea;
printf("请输入杯数:");
scanf("%f", &cup);
pint = cup / PINT_CUP;
ounce = cup * CUP_OUNCE;
spoon = ounce * OUNCE_SPOON;
tea = spoon * SPOON_TEA;
printf("%.1f cup equals %.1f pint,%.1f ounce,%.1f spoon,%.1f tea\n",
cup, pint, ounce, spoon, tea);
return 0;
}