C语言程序设计计算器

[用C语言编写一个计算薪水的程序]/*工资计算程序*/ #include main() { float originWage； /*应发工资*/ float realWage； /*实发工资*/ float tax； /*所缴税款*/ int i,hour,amount,money; printf（＂请选择工资种...+阅读

C语言程序设计计算器

#include#include#include#define NULL 0 #define LEN sizeof(struct student) struct student {long num; char name[20]; float s[4]; struct student *next; }; int n; struct student *readin(void) {struct student *head; struct student *p1,*p2; float x,y,z; n=0; p1=(struct student *)malloc(LEN); p2=p1; scanf(＂%ld%s%f%f%f＂,&p1->num,p1->name,&x,&y,&z); p1->s[0]=x; p1->s[1]=y; p1->s[2]=z; p1->s[3]=((x+y+z)/3); while(p1->num!=NULL) {n=n+1; if(n==1)head=p1; else {p2->next=p1; p2=p1; } p1=(struct student *)malloc(LEN); scanf(＂%ld%s%f%f%f＂,&p1->num,p1->name,&x,&y,&z); p1->s[0]=x; p1->s[1]=y; p1->s[2]=z; p1->s[3]=((x+y+z)/3); } p2->next=NULL; return(head); } struct student *taxis(struct student *x) {struct student *p3,*p4,*p5,*q; int i; p3=x->next; p4=x; for(i=0;inum!=0) {if(p4->s[3]s[3]) {if(p4==x) {q=p3; p4->next=p3->next; p3->next=p4; p3=p4->next; x=q; p5=q; } else {p5->next=p3; p4->next=p3->next; p3->next=p4; p5=p3; p3=p4->next; } } else {if(p4==x) {p5=x; p4=p3; p3=p3->next; q=x; } else {p5=p4; p4=p3; p3=p3->next; } } } p3=x->next; p4=x; } return(q); } struct student *insert(struct student *o) {struct student *pl,*p6,*p7,*p8,*head; float a,b,c; int w=0; printf(＂input a student data!\n＂); pl=(struct student *)malloc(LEN); scanf(＂%ld%s%f%f%f＂,&pl->num,pl->name,&a,&b,&c); pl->s[0]=a; pl->s[1]=b; pl->s[2]=c; pl->s[3]=((a+b+c)/3); p6=o; p7=o; p8=o->next; while(p6->num!=0&w!=1) {if(p6->s[3]>pl->s[3]) {if(p6==o) {if(p8->num!=0) {head=p6; p6=o->next; p8=p8->next; } else {head=p6; p6->next=pl; pl->next=0; w=1; } } else {if(p8->num==0) {p6->next=pl; pl->next=0; w=1; } else {p6=p6->next; p7=p7->next; p8=p8->next; } } } else {if(p6==o) {head=pl; pl->next=o; w=1; } else {p7->next=pl; pl->next=p6; w=1; } } } return(head); } void search(struct student *pn) {struct student *p4,*p5; char na[20]; int u=1; p4=pn; p5=pn; printf(＂please input the name:\n＂); scanf(＂%s＂,&na); while(strcmp((p4->name),na)!=0&u!=0) {p5=p5->next; p4=p5; if(p5->num==0)u=0; } if(p4->num!=0) printf(＂%-12ld%s%8.1f%8.1f%8.1f%8.1f\n＂,p4->num,p4->name,p4->s[0],p4->s[1],p4->s[2],p4->s[3]); else {printf(＂Please input the right name!\n＂); search(pn); } } void save(struct student *ps) {FILE *fp; int i; struct student *p11,*p12; p11=ps; p12=ps; if((fp=fopen(＂D:\\score.txt＂,＂w＂))==NULL) {printf(＂cannot open file\n＂); return; } while(p12->num!=0) {fwrite(p11,sizeof(struct student),1,fp); p12=p12->next; p11=p12; } fclose(fp); printf(＂save in D:\\score.txt!\n＂); } extern void show(struct student *x) {struct student *p5; p5=x; if(x!=NULL) do {printf(＂%-12ld%s%8.1f%8.1f%8.1f%8.1f＂,p5->num,p5->name,p5->s[0],p5->s[1],p5->s[2],p5->s[3]); p5=p5->next; printf(＂\n＂); } while(p5->num!=0); } #define ONE ＂input 1 to insert a student data, input 2 to search a student data,\ninput 3 to save all students data, input 4 to printf all, input 0 to exit!\n＂ void main() {struct student *p,*k,*f; int t; printf(＂input students'number(Tab)name(Tab)score1(Tab)score2(Tab)score(Enter)\n＂); printf(＂and input 0 0 0 0 0 to end input!\n＂); p=readin(); if(n!=1) k=taxis(p); f=k; printf(ONE); scanf(＂%d＂,&t); while(t!=0) {if(t==1||t==2||t==3||t==4) {if(t==1)f=insert(f); if(t==2)search(f); if(t==3)save(f); if(t==4)show(f); } else printf(＂error!\n＂); scanf(＂%d＂,&t); } getch(); exit(0)； } 使用说明：注意：使用TURBO C++3.0进行编译时候，需要在File\Change Directory 选项将ex保存的路径（ex文件直接放在TC的的下一层，即与Project同层）输入Directory Name 再进行编译.使用File\Open打开文件. 使用WIN-TC可以直接打开就可以编译了.

怎样用C语言设计计算器？？

#include int main(void) { double number1 = 0.0; /* First operand value a decimal number */ double number2 = 0.0; /* Second operand value a decimal number */ char operation = 0; /* Operation - must be +, -, *, /, or % */ loop: printf(＂\nEnter the calculation\n＂); scanf(＂%lf %c %lf＂, &number1, &operation, &number2); /* Code to check the input goes here */ switch(operation) { case '+': /* No checks necessary for add */ printf(＂= %lf\n＂,number1 + number2); break; case '-': /* No checks necessary for subtract */ printf(＂= %lf\n＂,number1 - number2); break; case '*': /* No checks necessary for multiply */ printf(＂=%lf\n＂,number1 * number2); break; case '/': if(number2 == 0) /* check second operand for zero */ printf(＂\n\n\aDivision by zero error!\n＂); else printf(＂=%lf\n＂,number1 / number2); break; case '%': /* Check second operand for zero */ if((long)number2 == 0) printf(＂\n\n\aDivision by zero error!\n＂); else printf(＂=%ld\n＂,(long)number1 % (long)number2); break; default: printf(＂\n\n\aIllegal operation!\n＂); break; } goto loop; return 0; }

怎样用VB设计简单计算器

Dim x As String Private Sub Command1_Click() Text1.Text = Text1.Text & ＂1＂ End Sub Private Sub Command10_Click() Text1.Text = Text1.Text & ＂6＂ End Sub Private Sub Command11_Click() Text1.Text = Text1.Text & ＂9＂ End Sub Private Sub Command12_Click() If Label1.Caption = ＂+＂ Then Text1.Text = Trim(Str(Val(x) + Val(Text1.Text))) End If If Label1.Caption = ＂-＂ Then Text1.Text = Trim(Str(Val(x) - Val(Text1.Text))) End If If Label1.Caption = ＂*＂ Then Text1.Text = Trim(Str(Val(x) * Val(Text1.Text))) End If If Label1.Caption = ＂/＂ Then If Val(Text1.Text) = 0 Then Text1.Text = ＂除数不能为零＂ Else If -1

c程序设计一个简单计算器

#include #include void main(); void jia() { int a,b; printf(＂print a and b:\ ＂); scanf(＂%D%D＂,&a,&b); printf(＂a+b=%d\ \ ＂,a+b); main(); } void jian() { int a,b; printf(＂print a and b:\ ＂); scanf(＂%D%D＂,&a,&b); printf(＂a-b=%d\ \ ＂,a-b); main(); } void cheng() { int a,b; printf(＂print a and b:＂); scanf(＂%D%D＂,&a,&b); printf(＂a*b=%d\ \ ＂,a*b); main(); } void chu() { double a,b; printf(＂print a and b:＂); scanf(＂%lf%lf＂,&a,&b); if (!b){printf(＂ensure your number!\ ＂);chu();}; printf(＂a/b=%5.5f\ \ ＂,a/b); main(); } void choose() { printf(＂ensure your number!\ ＂); main(); } void main() { int i; printf(＂0(EXIT)\ 1(+);\ 2(-);\ 3(*);\ 4(/);\ choose:＂); scanf(＂%D＂,&i); switch(i) { case 0:break; case 1:jia();break; case 2:jian();break; case 3:cheng();break; case 4:chu();break; default :choose();break; } }