[工学]C语言实验报告

1、.实验一顺序结构：#include(math.h)#include(stdio.h)main()double x,y;printf("please enter x:")scanf("%f",&x);y=3.0/4*pow(x,5)+12*pow(x,4)-7.3*pow(x,3)-8.0/3*pow(x,2)+2*x-4printf("ny=%lf",y);任意输入一个三位数，然后逆序输出，要有输入数据的提示语句。#include"stdio.h"#include"math.h"main

2、()int x,a,b,c,m;printf("n please enter a number x:");scanf("%d",&x);a=x/100;b=x%100/10;c=x%10;m=c*100+b*10+a;printf("n after exchanging:%dn",m);用八进制的形式输出个位数的ASCII码。#include"stdio.h"#include<math.h>main()int x,a,b,c,m;printf("n please enter a num

3、ber x:");scanf("%d",&x);a=x/100+'0'b=x%100/10+'0'c=x%10+'0'm=c*100+b*10+a+'0'printf("n 交换后各位数的八进制ASCII码:%o,%o,%o,%on",c,b,a,m);实验2#include<stdio.h>#include<math.h>main()double y,x;int i=1;printf("n请输入变量x：");scanf(&quo

4、t;%lf",&x);if(x<-1|x>=2) i=0;if(-1<=x&&x<0) y=4*x-8;else if(0<=x&&x<1) y=3*pow(x,2)+10*x-1;else if(1<=x&&x<2) y=8*pow(x,3)-3*x*x+2*x-1;if(!i) printf("n data error");else printf("ny=%lfn",y);#include<stdio.h>main()int

5、i,j=1;double m,x,y;printf("n请输入苹果等级、数量和所付款：");scanf("%lf%lf%lf",&i,&m,&x);switch(i)case 1: y=5.5*m;break;case 2:y=4.2*m;break;case 3:y=3.0*m;case 4: y=2.5*m;default:j=0;if(j)printf("应付钱：y=%.2lf找零：x-y=%lfn",y,x-y);if(m<0|x<y|j=0) printf("data error

6、n");单层循环计算1!+2!+3!+4!+5!#include<stdio.h>main()int k;long s,t;s=0;t=1;for(k=1;k<=5;k+)t=t*k;s=s+t;printf("ns=%ld",s);双层循环#include<stdio.h>void main()int i,j,t;long int s=0;for(i=1;i<=5;i+)t=1;for(j=1;j<=i;j+)t*=j;s+=t;printf("n%ld",s);定义一个有10个元素的一维数组coun

7、t，从键盘上输入8个整数，将其按从大到小的顺序排列，并将排列后的数组输出。1做出流程图2）用数组的方法编写程序3）用指针的方法编写程序。#include<stdio.h>main() int a10,i,j,t;for(i=0;i<8;i+) scanf("%d",&ai);for(i=0;i<8;i+) for(j=i+1;j<8;j+) if(aj>ai) t=ai;ai=aj;aj=t; continue; for(i=0;i<8;i+)printf("%8d",ai);输入2个字符串，将这两个字符

8、串连接起来并输出，再将连接后的字符串反向。1）分别输出连接后的字符串和反向后的字符串，并求连接后字符串的长度。#include<string.h>#include<stdio.h>void main()int i,j,len;char a110,a25,a310; printf("输入数组a1中的五个元素：");gets(a1);printf("输入数组a2中的五个元素：");gets(a2); strcat(a1,a2);len=strlen(a1);printf("连接后的字符串为：%s",a1);prin

9、tf("n连接后的字符串长度为：%d",len);for(i=0;i<=10;i+)a3i=a19-i;printf("n反向后的字符串是：");for(j=0;j<=10;j+)printf("%c",a3j);printf("n");编写一函数，统计字符串中字母、数字、空格和其他的字符的个数。从主函数中输入字符串并输出统计结果。一、用字符数组传送的方式实现函数的调用：#include<stdio.h>#include<string.h>int letter,space,digit,other;void func(char c)if('A'<=c&&c<='z'|'a'<=c&&c<='z')letter+;else if(c=' ') space+;else if('0'<=c&&c<='9') digit+;else other+;main()char a50;int len