C Primer Plus（第6版）第五章编程练习答案

     第五章编程练习的答案，坚持萌新风格不动摇。#include<stdio.h>
int main(void)
{
int Minute, Hour;
const int SYSTEM = 60; //定义一个为60的进制用于单位转换

printf("请以分钟为单位输入一个时间:\n");
scanf("%d", &Minute);

while (Minute >= 0)
{
printf("%d分钟等于%d小时%d分钟\n", Minute, Minute / SYSTEM, Minute % SYSTEM );
printf("请再次以分钟为单位输入一个时间:\n");
scanf("%d", &Minute);
}
printf("输入数据小于等于0，错误。");

return 0;

}

#include<stdio.h>
int main(void)
{
int x, i;
i = 0;

printf("请输入一个整数:\n");
scanf("%d", &x);
while (i++ < 11)
{
printf("%d\t", x++);
}

return 0;
}

#include<stdio.h>
int main(void)  // 符号常量放置在main()函数后
#define SYSTEM 7 //定义一个为7的进制用于单位转换
{
int Day;

printf("请以天为单位输入一个时间:\n");
scanf("%d", &Day);

while (Day >= 0)
{
printf("%d天等于%d周%d天\n", Day, Day / SYSTEM, Day % SYSTEM );
printf("请再次以天为单位输入一个时间:\n");
scanf("%d", &Day);
}
printf("输入数据小于等于0，错误。");

return 0;
}

#include<stdio.h>
int main(void)
#define SYSTEM 0.3937 //厘米与英寸
#define SYSTEM1 0.0833  //英寸和英尺
#define SYSTEM2 0.0328 //厘米和英尺
{
float high, n;
int m;

printf("Enter a height in centimeters:\n");
scanf("%f", &high);

while (high >= 0)
{
m = high * SYSTEM2;
n = (high * SYSTEM)- (m / SYSTEM1);

printf("%.1f cm = %d feet, %.1f inches\n", high, m, n);
printf("Enter a height in centimeters(<=0 to quit):\n");
scanf("%f", &high);
}
printf("bye");

return 0;
}

#include <stdio.h>
int main(void)
{
int count, sum, day;
sum = 1;
count = 1;

scanf("%d", &day);

while (count++ < day)
sum = sum + count;
printf("sum = %d\n", sum);

return 0;
}

#include <stdio.h>
int main(void)
{
int count, sum, day, t;
sum = 0;
count = 0;

scanf("%d", &day);

while (count++ < day)
{
t = count * count;
sum = sum + t;
}
printf("sum = %d\n", sum);

return 0;
}

#include <stdio.h>
void pound(double n);
int main(void)
{
double x;

printf("请输入一个double类型的值:");
scanf("%lf", &x);

pound(x);

return 0;
}
void pound(double n)
{
printf("%lf", n * n * n);
}

#include <stdio.h>
int main(void)
{
int n, m;

printf("This program computes moduli.\n");
printf("Enter an integer to serve as the second operand:");
scanf("%d", &n);
printf("Now Enter the first operand:");
scanf("%d", &m);
while (n > 0)
{

#include <stdio.h>
void Temperatures(double n);
int main(void)
{
float n;

while (scanf("%f", &n) == 1) //用于检验返回值，理解为什么只是用一个scanf()函数
{
printf("true\n");
Temperatures(n);
}
printf("error");
return 0;
}
void Temperatures(double n)
{
const float x = 273.16;
float y = 5.0 / 9.0 * (n -32.0);

printf("摄氏度:%.2f\n开氏温度:%.2f\n华氏温度:%.2f\n", y, y + x, n);

}