|
| <!doctype html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Untitled Document</title> |
| </head> |
| |
| <body> |
| <script type="text/javascript"> |
| a = parseInt(prompt("Nhap vao so a: ", " ")); |
| b = parseInt(prompt("Nhap vao so b: ", " ")); |
| pt = prompt("Nhap vao phep tinh ma ban muon tinh ( +, -, *, /) "); |
| tong=a+b; |
| hieu=a-b; |
| nhan=a*b; |
| chia=a/b; |
| |
| /*//xuat ket qua |
| if(c == "+") |
| document.write("Ket qua " +a+ " " +pt+ " " +b+ " = " +tong); |
| else if(c == "-") |
| document.write("Ket qua " +a+ " " +pt+ " " +b+ " = " +hieu); |
| else if(c == "*") |
| document.write("Ket qua " +a+ " " +pt+ " " +b+ " = " +nhan); |
| else |
| document.write("Ket qua " +a+ " " +pt+ " " +b+ " = " +chia); |
| //else if(c!="+" && c!="-" && c!="*" && c!="/"); |
| //document.write("Ban nhap sai phep tinh roi: ");*/ |
| switch(pt) |
| { |
| case "+" : document.write("Ket qua " +a+ " " +pt+ " " +b+ " = " +tong); |
| break; |
| case "-" : document.write("Ket qua " +a+ " " +pt+ " " +b+ " = " +hieu); |
| break; |
| case "*" : document.write("Ket qua " +a+ " " +pt+ " " +b+ " = " +nhan); |
| break; |
| case "/" : if(b==0) |
| document.write(alert ("b phải khác không mới tính được")); |
| else |
| document.write("Ket qua " +a+ " " +pt+ " " +b+ " = " +chia); |
| break; |
| default: document.write("Ban nhap sai phep tinh."); |
| } |
| </script> |
| </body> |
| </html> |
| |
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