void modifylesson(int index, string subject, string topic) { if (index >=0 && index < lessons.size()) { lessons[index].subject = subject; lessons[index].topic = topic; } }


The provided code snippet is a function in C++ that modifies the subject and topic of a lesson at a given index. However, there are a few issues with this code: 1. The `lessons` vector or array is not defined within the scope of this function. It needs to be passed as an argument or declared globally. 2. The `Lesson` class or struct is not defined. We need to know its structure to understand how we can modify its properties. 3. There's no error handling for when the index is out of bounds. 4. The function doesn't return anything, but it might be useful to have some feedback on whether the operation was successful or not. Here's a corrected version of the function, assuming that `Lesson` is a struct with `subject` and `topic` as string members, and `lessons` is a vector of `Lesson` objects: ```cpp #include <vector> #include <string> struct Lesson { std::string subject; std::string topic; }; void modifyLesson(std::vector<Lesson>& lessons, int index, const std::string& subject, const std::string& topic) { if (index >= 0 && index < lessons.size()) { lessons[index].subject = subject; lessons[index].topic = topic; // Optionally, you could print a success message or return a boolean value indicating success. } else { // Optionally, handle the error case by printing an error message or throwing an exception. std::cerr << "Error: Index out of range." << std::endl; } } ``` This version of the function takes a reference to the `lessons` vector and uses constant references for the subject and topic strings to avoid unnecessary copies. It also includes error handling for out-of-bounds indices. [2024-07-01 14:44:09 | AI写代码神器 | 422点数解答]
- void modifylesson(int index, string subject, string topic) { if (index >=0 && index < lessons.size()) { lessons[index].subject = subject; lessons[index].topic = topic; } }(422点数解答 | 2024-07-01 14:44:09)189
- void modifylesson(int index, string subject, string topic) { if (index >=0 && index < lessons.size()) { lessons[index].subject = subject; lessons[index].topic = topic; } 是什么意思(111点数解答 | 2024-07-01 14:44:36)289
- 快速排序:# include< iostream>using namespace std;# include< stdlib. h># include< time. h>const int n =10;const int min= 10;const int max=99;int getrand( int min, int max){return ( rand()%( max-min+1)+ min);}void set( int r[], int n){int i;for(i=0;i<n;i++)r[i]=getrand(min, max);}void show( int r[], int n){int i;for(i=0;i<n;i++)cout << r[i]<<" ";cout << endl;}int partition( int r[], int i, int j){//由你完成}void quicksort( int r[], int i, int j){//由你完成}int main(){srand( time(0));int a[n];set(a, n);cout<<"(710点数解答 | 2024-11-14 10:44:25)204
- 快速排序:# include< iostream>using namespace std;# include< stdlib. h># include< time. h>const int n =10;const int min= 10;const int max=99;int getrand( int min, int max){return ( rand()%( max-min+1)+ min);}void set( int r[], int n){int i;for(i=0;i<n;i++)r[i]=getrand(min, max);}void show( int r[], int n){int i;for(i=0;i<n;i++)cout << r[i]<<" ";cout << endl;}int partition( int r[], int i, int j){//由你完成}void quicksort( int r[], int i, int j){//由你完成}int main(){srand( time(0));int a[n];set(a, n);cout<<"(951点数解答 | 2024-11-14 10:46:29)198
- 快速排序:# include< iostream>using namespace std;# include< stdlib. h># include< time. h>const int n =10;const int min= 10;const int max=99;int getrand( int min, int max){return ( rand()%( max-min+1)+ min);}void set( int r[], int n){int i;for(i=0;i<n;i++)r[i]=getrand(min, max);}void show( int r[], int n){int i;for(i=0;i<n;i++)cout << r[i]<<" ";cout << endl;}int partition( int r[], int i, int j){//由你完成}void quicksort( int r[], int i, int j){//由你完成}int main(){srand( time(0));int a[n];set(a, n);cout<<"(472点数解答 | 2024-11-14 10:51:44)179
- #include<iostream> using namespace std;#include<stdlib.h>#include<time.h> const int n =10; const int min =10; const int max =99; int getrand(int min, int max) { return (rand() % (max - min +1) + min); void set(int r[], int n){ int i; for(i = 0; i< n; i++) r[i] = getrand(min,max); void show(int r[], int n) { int i; for (i = 0; i<n;i++) cout << r[i] << ""; cout << endl;}void sift(int r[],int m,int k){ } void heapsort(intr[], int n){ //由你完成 int main(){ srand(time(0)); int a[n]; set(a,n); cout <<"原序(417点数解答 | 2024-11-28 11:20:23)252
- c语言现在有n枚硬币,其中有一枚是假的,假的硬币比真币轻,但也只轻一点点,而**和真币的外观是一模一样的,从外观上无法辨别硬币的真假,请写程序找出**。 程序的要求: 必须使用递归调用函数实现 递归函数原型必须为:int findfakecoin(int *p, int low, int high) 程序中必须包含函数:int getsum(int *p, int start, int end) main函数已经写好,请编写程序剩余部分的代码并提交。 main函数如下: int main() { int coins[n]; int m; int index; int getsum(int *p, int start, int end); int findfakecoin(int *p, int low, int high); scanf("%d", &m); for (int i = 0; i < m; ++i(497点数解答 | 2024-12-02 22:03:42)184
- void deletelesson(int index) { if (index >=0 && index < lessons.size()) { lessons.erase(lessons.begin() + index); } } 是什么意思(107点数解答 | 2024-07-01 14:50:16)170
- void __fastcall sub_80022ec(int a1, uint8_t *a2, uint8_t *a3, uint8_t *a4) { _byte *v4; // r4 unsigned __int8 *v5; // r4 int v6; // r4 int v7; // r4 int v8; // r4 int v9; // r4 int v10; // r4 int v11; // r4 int v12; // r4 int v13; // r4 int v14; // r4 int v15; // r4 int v16; // r4 int v17; // r4 int v18; // r4 int v19; // r4 int v20; // r5 int v21; // r6 int v22; // lr unsigned int v23; // r6(143点数解答 | 2024-11-01 18:27:18)182
- #include<iostream> using namespace std;#include<stdlib.h>#include<time.h> const int n =10; const int min =10; const int max =99; int getrand(int min, int max) { return (rand() % (max - min +1) + min); void set(int r[], int n){ int i; for(i = 0; i< n; i++) r[i] = getrand(min,max); void show(int r[], int n) { int i; for (i = 0; i<n;i++) cout << r[i] << ""; cout << endl; void heapsort(intr[], int n){ //由你完成 int main(){ srand(time(0)); int a[n]; set(a,n); cout <<"原序列:"; show(a,n); cout <<"新序列:\n"; h(684点数解答 | 2024-11-28 11:21:15)197
- #include <stdio.h> #include <stdlib.h> #include <windows.h> #include <time.h> #include <conio.h> #include <unistd.h> #define mapheight 24 #define mapwidth 60 struct { int x; int y; } bean; struct { int x; int y; } eater; int key; int score1=0; void gotoxy(int x,int y); void drawmap(); void createbean(); void updatescore(); void keydown(); //0.光标 void gotoxy(int x,int y) { //控制输出时的光标位置 handle hout = getstdhandle(std_output_handle); coord pos; pos.x =x; pos.y =y; setconsolecursorpos(66点数解答 | 2024-11-15 22:33:26)184
- #include<iostream> using namespace std;#include<stdlib.h>#include<time.h> const int n=10; const int min=10; const int max=99; int getrand(inmin,int max) { return (rand()%(max-min+1)+min); void set(int r[],int n) { int i; for(i=0; i<n; i++) r[i]=getrand(min,max); void show(intr[],int n){ int i; for(i=0; i<n; i++) cout<<r[i]<<""; cout<<endl; void insertsort(int r[],int n){//由你完成} int main() { srand(time(0)); int a[n]; set(a,n); cout<<"原序列:"; show(a,n); cout<<"新序列: \n; insertsort(a,n);//show(a,n);(690点数解答 | 2024-10-31 10:11:20)196