草稿 草稿

 #include <stdio.h>

#include <stdlib.h>
int main()
{
int x,y,result;
int ch;
 
int add(int, int);
int sub(int, int);
 
 
printf("1. add\n");
printf("2. sub\n");
printf("3. mul\n");
printf("4. div\n");
printf("================\n");
 
printf("請輸2個數數:");
scanf("%d %d", &x,&y);
printf("choose Function: ");
scanf("%d",&ch);
//printf("%d\n",ch);
 
 
switch(ch)
{
case 1:
result=add(x,y);
printf("The result is=%d\n",result);
break;
case 2:
result=sub(x,y);
printf("The result is =%d\n",result);
break;
default:
printf("選項錯誤 %d\n",ch);
}
 
system("pause");
return 0; 
}
 
 
int add(int a,int b)
{
return(a+b);
 
int sub(int a,int b)
{
return(a-b);
完成 完成

#include <stdio.h>

#include <stdlib.h>

int main()
{
int x,y,result;
int ch;
 
int add(int, int);
int sub(int, int);
int mul(int, int);
int divide(int, int);
 
 
printf("1. add\n");
printf("2. sub\n");
printf("3. mul\n");
printf("4. div\n");
printf("================\n");
 
printf("請輸2個數數:");
scanf("%d %d", &x,&y);
printf("choose Function: ");
scanf("%d",&ch);
//printf("%d\n",ch);
 
 
switch(ch)
{
case 1:
result=add(x,y);
printf("The result is=%d\n",result);
break;
case 2:
result=sub(x,y);
printf("The result is =%d\n",result);
break;
case 3:
result=mul(x,y);
printf("The result is =%d\n",result);
break;
case 4:
result=divide(x,y);
printf("The result is =%d\n",result);
break;
printf("選項錯誤 %d\n",ch);
}
 
system("pause");
return 0; 
}
 
 
int add(int a,int b)
{
return(a+b);
 
int sub(int a,int b)
{
return(a-b);
 
int mul(int a,int b)
{
return(a*b);
 
int divide(int a,int b)
{
return(a/b);
網頁文章 javax.portlet.title.56

#include <stdio.h>

#include <stdlib.h>
 
int main()
{
int x,y,result;
int ch;
 
int add(int, int);
int sub(int, int);
int mul(int, int);
int divide(int, int);
 
 
printf("1. add\n");
printf("2. sub\n");
printf("3. mul\n");
printf("4. div\n");
printf("================\n");
 
printf("請輸2個數數:");
scanf("%d %d", &x,&y);
printf("choose Function: ");
scanf("%d",&ch);
//printf("%d\n",ch);
 
 
if(ch==1)
{
 result=add(x,y);
 printf("%d\n" , result);
}
else if(ch==2)
{
result=sub(x,y);
printf("%d\n" , result);
}
else if(ch==3)
{
result=mul(x,y);
printf("%d\n" , result);
}
else if(ch==4)
{
result=divide(x,y);
printf("%d\n" , result);
}
else
printf("廢物 只能按1234\n");
 
system("pause");
return 0; 
}
 
 
int add(int a,int b)
{
return(a+b);
 
int sub(int a,int b)
{
return(a-b);
 
int mul(int a,int b)
{
return(a*b);
 
int divide(int a,int b)
{
return(a/b);