武汉理工大学《C语言程序设计》实验报告答案.doc

注：在Visual C+ 6.0编译环境中亲自调试通过，但不保证在Turbo C中通过。实验二 选择结构的程序设计（题目当初没抄下来，这是根据程序整理的）1. 编程实现分段函数#includemain()float x,y;printf(Please input x:);scanf(%f,&x);if (x=2)printf(Data Errorn);elseif (x=-1&x=0&x=1&x2)y=8*x*x*x*x-3*x*x+2*x-1;printf(ny=%fn,y);2. 苹果有三个等级，一级5.50元/斤，二级3.00元/斤，三级2.50元/斤。编写程序，输入苹果的等级，购买的数量和所付的钱数，输出等级，购买的数量、应付钱数和找零。#includemain()int level;double weight,pay,money,charge;printf(Please input the level:);scanf(%d,&level);printf(Please input the weight you want:);scanf(%lf,&weight);printf(Please input the money you pay:);scanf(%lf,&pay);if (level4|weight0) printf(Data Errorn);elseif (level=1)money=weight*5.50;else if (level=2)money=weight*4.20;else if (level=3)money=weight*3.00;else if (level=4)money=weight*2.50;charge=pay-money;printf(nLevel:%dnweight:%gn,level,weight);printf(money:%gncharge:%gnn,money,charge);实验三 循环结构1. 编程计算 1！+2！+3！+4！+5！l 分别用单层循环和双层循环实现l 考虑#includemain()int i,x;double j,k,sum;printf(Please input a number:);scanf(%d,&x);/用单层循环for(sum=0,j=1,i=1;i=x;i+)j*=i;sum+=j;printf(The result is %lfn,sum);/用双层循环for(sum=0,i=1;i=x;i+)for(k=1,j=1;j=i;j+) k*=j;sum+=k;printf(The result is %lfn,sum);2. 共20个评委给选手评分，去掉1个最高分，去掉1个最低分，其余18名评委的平均分即选手最终得分#include main() double score,min,max,avg=0; int i; /下面是为了输入第一个数 printf(Please input 20 scores.n); printf(Score 1: ); scanf(%lf,&score); min=score;max=score; avg+=score; / 下面为了输入剩余19个数 for(i=2;i=20;i+) do printf(Score %d: ,i); scanf(%lf,&score); while(scoremax) max=score; avg+=score; avg=avg-min-max; avg/=18; printf(nThe average score is %lf:n,avg);实验四 数组和指针的应用1. 定义一个有10元素的一位数组count，从键盘上输入8个整数，将其按从大到小的顺序排列，并将排序后的数组输出（1） 数组方法#includemain()int count10,t,i,j;printf(Please input 8 numbers:n);for(i=0;i8;i+)scanf(%d,&counti);for(i=0;i8;i+)for(j=i+1;j8;j+)if (counticountj)t=counti;counti=countj;countj=t;printf(The sorted array is as follows:n);for (i=0;i8;i+)printf(%d ,counti);（2） 指针方法#includemain()int count10,t,i,j,*p=count;printf(Please input 8 numbers:n);for(i=0;i8;i+)scanf(%d,&pi);for(i=0;i8;i+)for(j=i+1;j8;j+)if (*(p+i)*(p+j)t=*(p+i);*(p+i)=*(p+j);*(p+j)=t;printf(The sorted array is as follows:n);for (i=0;i8;i+)printf(%d ,counti);2. 输入2个字符串，将二者连接并输出，再将连接后的字符串反向排列并输出，并求连接后字符串的长度#include#includemain()int i,len;char a151,a226,t51;printf(Please input 2 strings:n);gets(a1);gets(a2);strcat(a1,a2);printf(The joint string is: %s,a1);len=strlen(a1);printf(nThe length of the linked string is: %dn,len);for(i=0;ilen;i+) ti=a1len-i-1;tlen=0;strcpy(a1,t);printf(The reversed string is: %sn,a1);实验五 函数应用的程序设计1. 要求是：编写一函数，统计字符串中字母、数字、空格和其他字符的个数 在主函数中输入字符串并输出统计结果 值传送：#includevoid fun(char a,int *b) if(a=A&a=a&a=0&a=9)b1+;else if(a=32)b2+;else b3+;main() char a50;int b4,i,j,k;for(i=0;i3;i+)for(j=0;j4;j+)bj=0; printf(nPlease input a string:n);gets(a);k=0;while(ak!=0) fun(ak,b);k+;printf(The string have %d letters, %d numbers, %d spaces, %d other charsn,b0,b1,b2,b3); 地址传递：#includevoid fun(char *a,int *b)int i=0;while(ai != 0)if(ai=A&ai=a&ai=0)&(ai=9)b1+;else if(ai=32)b2+;else b3+;i+;main() char a50;int b4,i,j;for(i=0;i3;i+)