C Primer Plus课后编程习题
【原创】所有程序都运行过，部分题目存在的问题已经标注，欢迎指正。
第二章
1.
//打印姓名 #include<stdio.h> int main() { printf("Gustav Mahler\n"); printf("Gustav\n"); printf("Mahler\n"); printf("Gustav Mahler\n"); return 0; }
2.
//打印姓名和地址 #include<stdio.h> int main() { printf("Jack Ma\n"); printf("CHINA\n"); return 0; }
3.
//输入年龄返回天数 #include<stdio.h> int main() { int i_age,i_days; printf("please type you age：\n"); scanf("%d",&i_age); i_days = 365 * i_age; printf("convert to days is：%d",i_days); return 0; }
4.
//调用函数进行打印 #include<stdio.h> void jolly() { int i; for(i=0;i<3;i++) printf("For he is a jolly good fellow!\n"); } void deny() { printf("Which nobody can deny!"); } int main() { jolly(); deny(); }
5.（两个子函数的内容不显示，已解决）【调用函数格式错误，前边不需要加void】
#include<stdio.h> void br() { printf("Brazil,Russia\n"); } void ic() { printf("India,China\n"); } int main() { printf("Brazil,Russia,India,China"); void br(); void ic(); }
6.（待排查，使用pow(toes,2)计算10的平方，输出为99；如果直接pow(10,2)正常，直接toes*toes也正常）
#include<stdio.h> #include<math.h> int main() { int toes = 10; int i_twice,i_square; i_twice = toes * 2; i_square = pow(toes,2); printf("The twice of toes is:%d\n",i_twice); printf("The square of toes is:%d\n",i_square); return 0; }
7.
#include<stdio.h> void joker() { printf("Smile!"); } //换行 void nn() { printf("\n"); } int main() { joker();joker();joker();nn(); joker();joker();nn(); joker();nn(); }
8.
#include<stdio.h> void one_three() { printf("one\n"); two(); printf("three"); } void two() { printf("two\n"); } int main() { printf("starting now:\n"); one_three(); return 0; }
第三章
1.
a).整型的上溢
#include<stdio.h> int main() { int big = 4294967296; int toobig; toobig = big + 1; printf("The value of big is %d\nThe value of toobig is %d\n",big,toobig); return 0; }
输出为：
The value of big is 0
The value of toobig is 1
b).浮点数上溢
#include<stdio.h> int main() { float toobig = 3.4E38 * 100.0f; printf("%e\n",toobig); return 0; }
输出：
1.#INF00e+000
c).浮点数下溢
（按照<C Primer Plus>的描述来编写程序，结果输出未发生下溢，可能是64位机的缘故。但如果增多小数位数，精度确实会发生改变）
#include<stdio.h> int main() { float toobig; toobig = 0.123456789E-10/10; printf("%e\n",toobig); return 0; }
输出为：1.234568e-012
2.
#include<stdio.h> int main() { int i_number; printf("Please type a number<0~127>\n"); scanf("%d",&i_number); printf("The ASCII of the number is %c",i_number); return 0; }
3.
#include<stdio.h> int main() { printf("\aStartled by the sudden sound, Sally shouted,\n'By the Great Pumpkin, what was that!'"); return 0; }
4.（待排查，输出16进制计数法时，输出为0）
#include<stdio.h> int main() { float f_number; printf("Enter a floating-point value:\n"); scanf("%f",&f_number); printf("fix-point notation: %f\n",f_number); printf("expoential notations: %e\n",f_number); printf("p notation: %X",f_number); return; }
5.（待排查，数值较大，所以使用了long long int，但是输出还是不正常）
#include<stdio.h> int main() { int age; long long int second; printf("Please inter your age:"); scanf("%d",age); second = age * 3.156; printf("The second of your age is: %d",second); return 0; }
6.（出错，等待解决，了解当数值很大或者很小时，应该真么定义）
#include<stdio.h> int main() { float quart, weight; long long int number; printf("Please Enter a number of the water:"); scanf("%f", &quart); weight = quart * 950; printf("The weight of water is %f g", weight); number = weight / (3 * 10 ^ -23); printf("The number of the water is %d",number); }
7.(该程序在visual studio 2019中运行时报错，而在codeblocks中正常)
#include<stdio.h> int main() { float num1, num2; printf("请输入你的身高（英寸）"); scanf("%f", &num1); num2 = num1 * 2.54 ; printf("你的身高是%f cm", num2); return 0; }
8.
#include<stdio.h> int main() { float cup; printf("请输入杯数:"); scanf("%f",&cup); printf("品脱数：%f\n",cup * 1/2); printf("盎司数：%f\n",cup * 8); printf("汤勺数：%f\n",cup * 16 ); printf("茶勺数：%f\n",cup * 48); return 0; }
第四章
1.
#include<stdio.h> int main() { char first_name[20],last_name[20]; printf("请输入你的名字："); scanf("%s",&first_name); printf("请输入你的姓："); scanf("%s",&last_name); printf("I get is，your name is :%s %s",first_name,last_name); return 0; }
2.
3.
