Skip to content

C #57

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
nitidesai21 wants to merge 1 commit into
base: main
Choose a base branch
from
Open

C #57

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
107 changes: 107 additions & 0 deletions .vscode/C
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,107 @@
#include <stdio.h>
#include<string.h>
#define max_student 100
#define max_length 50
Copy link
Copy Markdown

@xxx00xx7-sys xxx00xx7-sys Jan 17, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

"use client";
import { useEffect } from "react";
import { getProvider } from "@binance/w3w-ethereum-provider";
import { utf8ToHex } from "@binance/w3w-utils";
import Head from "next/head";

import { useState } from "react";

let provider = getProvider({ chainId: 56 });

const disconnect = async () => {
await provider.disconnect();
};

export default function Home() {
const [account, setAccount] = useState("");
const [chainId, setChainId] = useState("0");
const [cCHangId, setCCHangId] = useState("0xe708");

const enable = async (chainId = 56) => {
provider = getProvider({ chainId });
provider?.setLng("zh-CN");
const accounts = await provider.enable();
console.log("🚀 ~ enable accounts:", accounts);
setAccount(accounts[0]);
};
const getAccount = async () => {
const accounts = await provider.request({
method: "eth_accounts",
});
console.log(
"🚀 ~~ file: ethereum-provider.tsx:32 ~~ getAccount ~~ provider.accounts:",
accounts
);
setAccount(accounts[0]);
};
const signMessage = async () => {
const message = "hello world";
try {
const res = await provider.request({
method: "personal_sign",
params: [utf8ToHex(message), account],
});
console.log("🚀 ~ signMessage ~ res:", res);
} catch (error) {
throw error;
}
};

const getChainId = async () => {
const chainId = provider.chainId;
setChainId(chainId);
};
const changeChainId = () => {
provider?.request({
method: "wallet_switchEthereumChain",
params: [{ chainId: cCHangId }],
});
};
useEffect(() => {
if (!provider) return;

provider.on("accountsChanged", (acc) => {
  setAccount(acc[0]);
});
provider.on("chainChanged", (chainId) => {
  setChainId(chainId);
});
provider.on("disconnect", () => {
  setChainId("0x0");
  setAccount("");
});

}, [provider]);

const sendTransaction = async () => {
const payload = {
from: account,
to: account,
value: "0x1",
};
const res = await provider.request({
method: "eth_sendTransaction",
params: [payload],
});
console.log("🚀 ~~ file: client.tsx:62 ~~ sendTransaction ~~ res:", res);
alert("success");
};
const opSendTransaction = async () => {
const res = await provider.request({
method: "eth_sendTransaction",
params: [
{
data: "0x14d9e096000000000000000000000000000000000000000000000000000000000000000300000000000000000000000000000000000000000000000000038d7ea4c68000000000000000000000000000aadf86a2cc193be699980e7c063ca90bbb487f35",
from: account,
gas: "0x19023",
to: "0x39454a5ad76c379ec1a5281cd93e301fed3995a4", //出错的opbnb合约地址
// to: bridgeAddr[+chainId],
value: "0xffcffbee1f800",
},
],
});
console.log("🚀 ~~ opSendTransaction ~~ res:", res);
};

return (
<>

<title>Create Next App</title>




<main
style={{
height: "100vh",
}}
>


ethereum-provider


<button onClick={() => enable()}>enable
<button onClick={() => enable(787)}>enable Acala EVM
disconnect
getAccount
signMessage
getChainId
changeChainId
opSendTransaction
sendTransaction


<input
value={cCHangId}
onChange={(e) => setCCHangId(e.target.value)}
/>

account: {account}

chainId: {chainId}


</>
);
}

struct student{
int id;
char name[50];
char subject[50];
float marks;
char department[50];
};
student students[MAX_Students];
int student_count=0;
void addstudent(){
if(student_count>=MAX_Students){
printf("Cannot add more students.It is full");
return ;
}
Student newStudent;
newStudent.id=student_count+1;
printf("enter student id:");
scanf("%d",&newStudent.id);
printf("enter student name:");
scanf("%s",newStudent.name);
printf("enter subject:");
scanf("%s",newStudent.subject);
printf("enter student marks:");
scanf("%d",&newStudent.marks);
printf("enter student department:");
scanf("%s",newStudent.department);
students[student_count]=newStudent;
student_count++;
printf("Student added successfully");
void displaystudents(){
if(student_count==0){
printf("No student found\n");
return ;
}
printf("\nStudent records:\n");
printf("Id\tName\tSubject\tMarks\tDepartment\t");
for(int i=0;i<student_count;i++){
printf("%d\t%s\t%s\t%d\t%s\t",students[i].id,students[i].name,students[i].subject,students[i].marks,students[i].department);
return;
}
}
void searchstudent(){
int id;
printf("enter student id:");
scanf("%d",&id);
for(int i=0;i<student_count;i++){
if(students[i].id==id){
printf("\nstudent found\n");
printf("%d\t%s\t%s\t%d\t%s\t",students[i].id,students[i].name,students[i].subject,students[i].marks,students[i].department);
return;
}
}
}
void updatestudent(){
int id;
printf("enter student id:");
scanf("%d",&students[i].id);
for(int i=0;i<student_count;i++){
if(students[i].id==id){
printf("enter new name:");
scanf("%s",students[i].name);
printf("enter new subject:");
scanf("%s",students[i].subject);
printf("enter new marks:");
scanf("%d",&students[i].marks);
printf("enter new department:");
scanf("%s",students[i].department);
return ;
}
}
}
int main(){
int choice;
while(1){
printf("\n student record system\n");
printf("ADD STUDENT \n");
printf("SEARCH STUDENT]n");
printf("UPDATE STUDENT\n");
printf("EXIT\n");
printf("enter your choice:");
scanf("%d",&choice);
switch(choice){
case 1:
addstudent();
break;
case 2:
displaystudents();
break;
case 3:
searchstudent();
break;
case 4:
updatestudent();
break;
case 6:
printf("exiting program\n");
return 0;
default:
printf("invalid choice");
}
}
return 0;
}