#include <iostream> using namespace std; void trim(char str[]) { int j=0; while(str[j]!='\0') { j++; } int i=0; while(str[i]==' ') { i++; } while(str[j-1]==' ') { j--; } str[j+1]='\0'; } int main() { int i=0; char a[1000]; cin.getline(a,1000); trim(a); while (a[i]!='\0') { cout<<a[i]; i++; } } 哪里有问题


你的代码试图实现一个去除字符串首尾空格的功能,但存在一些问题。以下是主要问题和改进建议: 1. 数组越界:在 `trim` 函数中,当处理完字符串后,你将 `str[j+1]='\0';` 这会导致数组越界,因为 `j` 已经指向了字符串的末尾。 2. 未正确移动字符:在去除首尾空格后,没有将中间的字符前移。 3. 未处理连续空格:如果字符串中有多个连续空格,它们不会被正确处理。 4. 未考虑空字符串:如果输入的是空字符串,程序会出错。 下面是修正后的代码: ```cpp #include <iostream> using namespace std; void trim(char str[]) { int start = 0, end = 0; int length = 0; // Find the length of the string while (str[length] != '\0') { length++; } // Find the first non-space character from the beginning while (str[start] == ' ') { start++; } // Find the last non-space character from the end end = length - 1; while (end >= 0 && str[end] == ' ') { end--; } // Move characters to the beginning of the array int j = 0; for (int i = start; i <= end; i++) { str[j++] = str[i]; } // Null-terminate the string str[j] = '\0'; } int main() { char a[1000]; cin.getline(a, 1000); trim(a); cout << a << endl; return 0; } ``` 解释: 1. 计算字符串长度:首先计算字符串的长度。 2. 找到第一个非空格字符的位置:从字符串的开头开始查找第一个非空格字符的位置。 3. 找到最后一个非空格字符的位置:从字符串的末尾开始查找最后一个非空格字符的位置。 4. 移动字符:将中间部分的字符移到字符串的开头。 5. 添加终止符:在新的字符串末尾添加终止符 `'\0'`。 这样,你的 `trim` 函数可以正确地去除字符串首尾的空格,并且不会发生数组越界的问题。 [2024-11-19 16:57:32 | AI写代码神器 | 579点数解答]
- #include <iostream> using namespace std; void trim(char str[]) { int j=0; while(str[j]!='\0') { j++; } int i=0; while(str[i]==' ') { i++; } while(str[j-1]==' ') { j--; } str[j+1]='\0'; } int main() { int i=0; char a[1000]; cin.getline(a,1000); trim(a); while (a[i]!='\0') { cout<<a[i]; i++; } }(556点数解答 | 2024-11-19 16:57:27)161
- #include <iostream> using namespace std; void trim(char str[]) { int j=0; while(str[j]!='\0') { j++; } int i=0; while(str[i]==' ') { i++; } while(str[j-1]==' ') { j--; } str[j+1]='\0'; } int main() { int i=0; char a[1000]; cin.getline(a,1000); trim(a); while (a[i]!='\0') { cout<<a[i]; i++; } } 哪里有问题(579点数解答 | 2024-11-19 16:57:32)136
- 检查代码 #include <ctype.h> #include <string.h> void verse(char* str) { *str = tolower(*str); int lens = strlen(str); printf("字符串长度为:%d\n", lens); for (int i = 0; i < lens / 2; i++) { char temp = str[i]; str[i] = str[lens - 1 - i]; str[lens - 1 - i] = temp; } } int pali(char *str) { int lens=strlen(str); char *reverse[lens+1]; strcpy(reverse, str); verse(reverse); return strcmp(str, reverse)==0; } int main() { char str[101];(655点数解答 | 2024-11-08 21:54:45)158
- 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)200
- 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)195
- 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)175
- #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)248
- #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)192
- #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)192
- #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);(147点数解答 | 2024-10-31 10:29:38)204
- #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);(703点数解答 | 2024-10-31 10:35:24)188
- #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 shellsort(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; shellsort(a,n);//show(a,n); re(593点数解答 | 2024-10-31 10:39:07)226