c语言详解(第五版)第二章程序设计项目答案

C语言详解（第五版） 程序设计项目答案 第二章

1.编写一个程序，以每英里0.35的费率计算一个售货员的里程偿还金。程序中要求与用户进行如下方式的交互。 #include #include int main(void)

{float mile_1,mile_2,miles,consume,payment; printf(\); printf(\); scanf(\,&mile_1); printf(\); scanf(\,&mile_2); printf(\); scanf(\,&consume); miles=mile_2-mile_1; payment=miles*consume; printf(\is %f\,miles,consume,payment); system(\); return(0); }

2.编写一个程序，用于辅助设计水力发电大坝。提示用户输入大坝高度，以及水流量。如果水由重力所做的功有90%转化为电能，测算会有多少M瓦的功率。 #include #include int main(void)

{double density,weight,gravitational_acceleration,

efficiency,height,water_flow_rate,work,electricity_power; printf(\); scanf(\,&density); printf(\); scanf(\,&gravitational_acceleration); printf(\); scanf(\,&height); printf(\electricity>\);

scanf(\,&efficiency); printf(\); scanf(\,&water_flow_rate); weight=density*water_flow_rate; work=weight*height*gravitational_acceleration; electricity_power=work*efficiency/1000000;

printf(\,electricity_power); system(\); return 0; }

3.编写一个程序，用于预测冰箱内的温度，断电后经过的时间是给定的。温度公式：。要求程序提示用户输入改时间，它以整数小时和分钟表示。需要注意的是，经历的世间应该转化为小时。 #include #include int main(void)

{ double time,temperature; int hour,minute;

printf(\，include hour and minute.For example 2 30(2 void space 30) >\);

scanf(\,&hour,&minute); time=hour+minute/60;

temperature=time*time*4/(time+2)-20;

printf(\℃?\,temperature); system(\); return 0; }

4.将华氏温度转换成摄氏温度。 #include #include int main(void) {int fahrenheit; double centigrade;

printf(\); scanf(\,&fahrenheit); centigrade=(fahrenheit-32)*5/9;

printf(\\,fahrenheit,centigrade); system(\); return 0; }

5.编写一个程序，将两个数作为输入数据，并显示它们的和 差 积 商； #include #include int main(void) {double x,y; double sum;

double difference; double product; double quotient;

printf(\); scanf(\,&x,&y); sum=x+y;

difference=x-y; product=x*y; quotient=x/y;

printf(\,sum);

printf(\,difference); printf(\,product); printf(\,quotient); system(\); return 0; }

6.如果要使一门课程获得所希望的分数等级没那么预测一下，在期末考试中所需要的分数。编写一个程序实现该目标，程序与用户按如下方式交互： #include #include int main(void) {char rank;

double minimum_average,current_average,score,percentage; printf(\); scanf(\,&rank);

printf(\); scanf(\,&minimum_average);

printf(\); scanf(\,¤t_average);

printf(\); scanf(\,&percentage);

score=minimum_average/(percentage/100)-current_average*(100-percentage)/percentage;

printf(\,score,rank); system(\); return 0; }

7.编写一个程序，计算在给定燃油的加仑数和房屋内燃油的效率后，可以给房屋释放多少热量。 #include #include int main(void)

{double volume,energy,efficiency;

printf(\); scanf(\,&volume);

printf(\); scanf(\,&efficiency);

energy=volume/42*5800000*efficiency;

printf(\,energy); system(\); return 0; }

9．计算剪草坪的时间 #include #include

int main(void)

{double length,width,velocity; double area,time;

printf(\); scanf(\,&length,&width); area=length*width;

printf(\); scanf(\,&velocity); time=area/velocity;

printf(\,time); system(\); return 0; }

10.编写一个程序，显示两个分数乘积后的分子与分母，并且显示该乘积的百分比。 #include #include int main(void) {double

numerator1,denominator1,numerator2,denominator2,numerator,denominator,percentage; printf(\); scanf(\,&numerator1);

printf(\); scanf(\,&denominator1);

printf(\); scanf(\,&numerator2);

printf(\); scanf(\,&denominator2); numerator=numerator1*numerator2;

denominator=denominator1*denominator2; percentage=numerator/denominator*100;

printf(\,numerator); printf(\,denominator); printf(\,percentage); system(\); return 0; }

12.勾股三元组的建立 #include #include int main(void)

{double m,n,side1,side2,hypotenuse; printf(\); scanf(\,&m);

printf(\); scanf(\,&n); side1=m*m-n*n;

side2=2*m*n;

hypotenuse=m*m+n*n;

printf(\,side1); printf(\,side2);

printf(\,hypotenuse); system(\); return 0; }

13.编写一个程序，计算喷气式飞机从航空母舰上弹射出发后的加速度。 #include #include int main(void)

{double acceleration,velocity,velocity_start,distance;;

printf(\); scanf(\,&velocity_start);

velocity=velocity_start*1000/3600;

printf(\); scanf(\,&distance);

acceleration=2*velocity*velocity/distance;

printf(\,acceleration); system(\); return 0; }