优C语言基础小项目 简单计算器

C语言基础小项目简单计算器#include<stdio.h>#include<math.h>#include<stdlib.h>#definepi3.1415926voidjisuan_shuim(){printf("\t\t\t*********************\n");printf("\t\t\t**\n");printf("\t\t\t*简单计算器*\n");printf("\t\t\t**\n");printf("\t\t\t*********************\n");printf("\t\t\t*功能选项：*\n");printf("\t\t\t*0、加法运算**4、十进制转二进制*\n");printf("\t\t\t*1、减法运算**5、二进制转十进制*\n");printf("\t\t\t*2、乘法运算**6、十进制转十六进制*\n");printf("\t\t\t*3、除法运算**7、三角函数值计算*\n");printf("\t\t\t*8、退出系统*\n");printf("\t\t\t*********************\n");}voidadd()//加法运算{charc,s;floata,b,sum;printf("请输入例如'a+b='：");scanf("%f%c%f%c",&a,&c,&b,&s);sum=a+b;printf("%f+%f=%f\n",a,b,sum);}voidjian()//减法运算{charc,s;floata,b,sum;printf("请输入例如'a-b='：");scanf("%f%c%f%c",&a,&c,&b,&s);sum=a-b;printf("%f-%f=%f\n",a,b,sum);}voidcheng()//乘法运算{charc,s;floata,b,sum;printf("请输入例如'a*b='：");scanf("%f%c%f%c",&a,&c,&b,&s);sum=a*b;printf("%f*%f=%f\n",a,b,sum);}voidchu()//除法运算{charc,s;floata,b,sum;printf("请输入例如'a/b='：");scanf("%f%c%f%c",&a,&c,&b,&s);sum=a/b;printf("%f/%f=%f\n",a,b,sum);}voidjz10_2()//十进制转二进制{inti=0,a[32],n,k;printf("请输入一个十进制整数：");scanf("%d",&n);while(n!=0){a[i]=n%2;n=n/2;i++;k=i;//记录a[]的长度}for(i=k-1;i>=0;i--)printf("%d",a[i]);printf("\n");}intpows(inta,intn)//求整数a的n次方{intsum=1,i;if(n>0)for(i=0;i<n;i++)sum=sum*a;elsesum=1;returnsum;}voidjz2_10()//二进制转十进制{intsum=0,n,k=0,i,len,j=0;charstr[32];printf("请输入一个二进制整数：");scanf("%s",str);while(str[k]!='\0'){k++;len=k;}for(i=len-1;i>=0;i--){n=(int)str[i]-48;sum=sum+n*pows(2,j);j++;}printf("%d\n",sum);}voidjz10_16()//十进制转十六进制{intn,i=0,x,k;chara[10];printf("请输入一个十进制整数：");scanf("%d",&n);while(n!=0){x=n%16;if(x<10)a[i]=(char)(x+48);//将0~9的整数对应转化为字符型的0~9elsea[i]=(char)(x+87);//将10~15的整数对应转化为字符型的a~fn=n/16;i++;k=i;//记录a[]的长度}for(i=k-1;i>=0;i--)printf("%c",a[i]);printf("\n");}voidsan_jiao()//三角函数值计算{ints;doublea,b,c,x;printf("请选择（0、求sin；1、求cos；2、求tan）：");scanf("%d",&s);switch(s){case0:printf("请输入角度x的大小：");scanf("%lf",&x);a=pi*x/180;printf("%f\n",sin(a));break;case1:printf("请输入角度x的大小：");scanf("%lf",&x);b=pi*x/180;printf("%f\n",cos(b));break;case2:printf("请输入角度x的大小：");scanf("%lf",&x);c=pi*x/180;printf("%f\n",tan(c));break;default:printf("请输入正确的选项！");break;}}intmain(){intcot;jisuan_shuim();printf("欢迎使用！\n");while(1){printf("***********************\n");printf("请输入你的选项：");scanf("%d",&cot);switch(cot){case0:add();//加法运算break;case1:jian();//减法运算break;case2:cheng();//乘法运算break;case3:chu();//除法运算break;case4:jz10_2();//十进制转二进制break;case5:jz2_10();//二进制转十进制break;case6:jz10_16();//十进