我想要这个c 语言代码#include<stdio.h> int main() { FILE *fp; char c; int n=0,n1=0; if((fp=fopen("my.txt","r"))==NULL) {printf("File open error!\n"); retur 1; } for(;fscanf(fp,"%c",&c)==1;n++) if(c=='\n')n1++; printf("字符个数:%d\n行数:%d\n",n,n1); return 0; }
时间: 2024-01-20 10:03:14 浏览: 27
好的,这是您需要的C语言代码:
```c
#include <stdio.h>
int main() {
FILE *fp;
char c;
int n = 0, n1 = 0;
if ((fp = fopen("my.txt", "r")) == NULL) {
printf("File open error!\n");
return 1;
}
for (; fscanf(fp, "%c", &c) == 1; n++) {
if (c == '\n') {
n1++;
}
}
printf("字符个数:%d\n行数:%d\n", n, n1);
return 0;
}
```
这段代码与您提供的代码几乎一致,使用`fopen`函数打开文件,通过循环和`fscanf`函数读取文件内容,统计字符个数和行数。如果文件打开失败,则会打印错误信息并退出程序。
相关问题
1.创建文件夹: #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <iostream> using namespace std; int main() { string folder_name = "new_folder"; mkdir(folder_name.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH); //创建文件夹 return 0; } 2.复制文件: #include <stdio.h> #include <stdlib.h> int main() { FILE *fp1, *fp2; //定义两个文件指针 char ch; fp1 = fopen("file1.txt", "r"); //打开要复制的文件 fp2 = fopen("file2.txt", "w"); //打开要复制到的文件 while ((ch = fgetc(fp1)) != EOF) { fputc(ch, fp2); //复制文件 } fclose(fp1); fclose(fp2); return 0; } 3.移动文件: #include <stdio.h> #include <stdlib.h> int main() { char old_path[100] = "old_folder/file1.txt"; char new_path[100] = "new_folder/file1.txt"; int result = rename(old_path, new_path); //移动文件 if (result == 0) { printf("移动成功\n"); } else { printf("移动失败\n"); } return 0; } 4.删除文件夹: #include <unistd.h> #include <stdio.h> int main() { char folder_name[100] = "new_folder"; int result = rmdir(folder_name); //删除文件夹 if (result == 0) { printf("删除成功\n"); } else { printf("删除失败\n"); } return 0; } 5.显示文件夹中的内容: #include <dirent.h> #include <stdio.h> int main() { DIR *dir; struct dirent *ent; char folder_name[100] = "new_folder"; dir = opendir(folder_name); //打开文件夹 while ((ent = readdir(dir)) != NULL) { printf("%s\n", ent->d_name); //遍历文件夹中的文件 } closedir(dir); return 0; } 6.查看文件内容: #include <stdio.h> int main() { FILE *fp; char ch; fp = fopen("file1.txt", "r"); //打开文件 while ((ch = fgetc(fp)) != EOF) { printf("%c", ch); //输出文件内容 } fclose(fp); return 0; } 7.修改文件权限: #include <sys/stat.h> #include <stdio.h> int main() { char file_name[100] = "file1.txt"; chmod(file_name, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH); //修改文件权限 return 0; } 8.搜索文件: #include <dirent.h> #include <stdio.h> #include <string.h> int main() { DIR *dir; struct dirent *ent; char folder_name[100] = "new_folder"; char search_name[100] = "file1.txt"; dir = opendir(folder_name); //打开文件夹 while ((ent = readdir(dir)) != NULL) { if (strcmp(ent->d_name, search_name) == 0) //搜索文件 { printf("找到文件:%s\n", ent->d_name); break; } } closedir(dir); return 0; }将上述代码整合成一个完整的程序代码
以下是整合后的完整代码:
```
#include <iostream>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
using namespace std;
int createFolder(string folder_name) {
int result = mkdir(folder_name.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH); //创建文件夹
if (result == 0) {
cout << "创建文件夹成功" << endl;
} else {
cout << "创建文件夹失败" << endl;
}
return result;
}
int copyFile(char* old_path, char* new_path) {
FILE *fp1, *fp2; //定义两个文件指针
char ch;
fp1 = fopen(old_path, "r"); //打开要复制的文件
fp2 = fopen(new_path, "w"); //打开要复制到的文件
if (fp1 == NULL || fp2 == NULL) {
cout << "打开文件失败" << endl;
return -1;
}
while ((ch = fgetc(fp1)) != EOF) {
fputc(ch, fp2); //复制文件
}
fclose(fp1);
fclose(fp2);
return 0;
}
int moveFile(char* old_path, char* new_path) {
int result = rename(old_path, new_path); //移动文件
if (result == 0) {
cout << "移动文件成功" << endl;
} else {
cout << "移动文件失败" << endl;
}
return result;
}
int deleteFolder(char* folder_name) {
int result = rmdir(folder_name); //删除文件夹
if (result == 0) {
cout << "删除文件夹成功" << endl;
} else {
cout << "删除文件夹失败" << endl;
}
return result;
}
int displayFolder(char* folder_name) {
DIR *dir;
struct dirent *ent;
dir = opendir(folder_name); //打开文件夹
while ((ent = readdir(dir)) != NULL) {
cout << ent->d_name << endl; //遍历文件夹中的文件
}
closedir(dir);
return 0;
}
int displayFile(char* file_name) {
FILE *fp;
char ch;
fp = fopen(file_name, "r"); //打开文件
if (fp == NULL) {
cout << "打开文件失败" << endl;
return -1;
}
while ((ch = fgetc(fp)) != EOF) {
cout << ch; //输出文件内容
}
fclose(fp);
return 0;
}
int changePermission(char* file_name) {
int result = chmod(file_name, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH); //修改文件权限
if (result == 0) {
cout << "修改文件权限成功" << endl;
} else {
cout << "修改文件权限失败" << endl;
}
return result;
}
int searchFile(char* folder_name, char* search_name) {
DIR *dir;
struct dirent *ent;
dir = opendir(folder_name); //打开文件夹
while ((ent = readdir(dir)) != NULL) {
if (strcmp(ent->d_name, search_name) == 0) { //搜索文件
cout << "找到文件:" << ent->d_name << endl;
closedir(dir);
return 0;
}
}
cout << "未找到文件" << endl;
closedir(dir);
return -1;
}
int main() {
string folder_name = "new_folder";
char old_path[100] = "old_folder/file1.txt";
char new_path[100] = "new_folder/file1.txt";
char file_name[100] = "file1.txt";
char search_name[100] = "file1.txt";
createFolder(folder_name);
copyFile(old_path, new_path);
moveFile(old_path, new_path);
deleteFolder("new_folder");
displayFolder("new_folder");
displayFile(file_name);
changePermission(file_name);
searchFile("new_folder", search_name);
return 0;
}
```
下列程序将数字字符串写入文件”data.txt“ #include<stdio.h> #include<string.h> int main(void){ FILE *fp; char buf[11] = "0123456789"; fp = 4 分 ; if( 2 分 ) { 4 分 ; fclose(fp); } else{ printf("unable to open the file !\n"); } return 0; }
下面是修改过的程序:
```
#include <stdio.h>
#include <string.h>
int main(void) {
FILE *fp;
char buf[11] = "0123456789";
fp = fopen("data.txt", "w");
if (fp != NULL) {
fwrite(buf, sizeof(char), strlen(buf), fp);
fclose(fp);
} else {
printf("unable to open the file !\n");
}
return 0;
}
```
主要修改如下:
1. 打开文件的方式应该是写入("w"),而不是 4 分。
2. 在成功打开文件后,使用 fwrite 函数将数字字符串写入文件。
3. 在完成文件操作后,需要关闭文件。