C Programming Language || Hands On Coding
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Hands-on C programming language challenges for beginners. Learn building logic by solving programs. Owner: @Pradeep_saii
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频道 C Programming Language || Hands On Coding (@c_programming_language_coding) 英语 语言赛道中的 是活跃参与者。目前社区聚集了 12 824 名订阅者，在 技术与应用 类别中位列第 9 562，并在 印度 地区排名第 31 207 位。
📊 受众指标与增长动态
自 невідомо 创建以来，项目保持高速增长，吸引了 12 824 名订阅者。
根据 26 八月, 2026 的最新数据，频道保持稳定运转。过去 30 天订阅人数变化为 -210，过去 24 小时变化为 -2，整体触达仍然可观。
- 认证状态： 未认证
- 互动率 (ER)： 平均受众互动率为 12.56%。内容发布后 24 小时内通常能获得 2.42% 的反应，占订阅者总量。
- 帖子覆盖： 每篇帖子平均可获得 1 612 次浏览，首日通常累积 310 次浏览。
- 互动与反馈： 受众积极参与，单帖平均反应数为 4。
- 主题关注点： 内容集中在 input, string, scanf("%d, array, element 等核心主题上。
📝 描述与内容策略
作者将该频道定位为表达主观观点的平台：
“Hands-on C programming language challenges for beginners. Learn building logic by solving programs.
Owner: @Pradeep_saii”
凭借高频更新（最新数据采集于 27 八月, 2026），频道始终保持新鲜度与高覆盖。分析显示受众积极互动，使其成为 技术与应用 类别中的关键影响点。
12 824
订阅者
-224 小时
-357 天
-21030 天
帖子存档
💻 Read File in Reverse Order
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *file;
char filename[100];
long file_size;
printf("Enter the filename: ");
scanf("%s", filename);
file = fopen(filename, "r");
if (file == NULL) {
perror("Error opening file");
return 1;
}
fseek(file, 0, SEEK_END);
file_size = ftell(file);
if (file_size == -1L) {
perror("Error getting file size");
fclose(file);
return 1;
}
char *buffer = (char *)malloc(file_size + 1);
if (buffer == NULL) {
perror("Memory allocation failed");
fclose(file);
return 1;
}
fseek(file, 0, SEEK_SET);
if (fread(buffer, 1, file_size, file) != file_size) {
perror("Error reading file");
fclose(file);
free(buffer);
return 1;
}
buffer[file_size] = '0';
printf("File content in reverse order:n");
for (long i = file_size - 1; i >= 0; i--) {
printf("%c", buffer[i]);
}
printf("n");
fclose(file);
free(buffer);
return 0;
}
Input: test.txt Output: Enter the filename: File content in reverse order: dlrow olleH
💻 Append Data to Existing File
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *fptr;
char data[100];
printf("Enter data to append: ");
scanf(" %[^n]", data);
fptr = fopen("example.txt", "a"); // Open file in append mode
if (fptr == NULL) {
printf("Error opening file!n");
return 1;
}
fprintf(fptr, "%sn", data);
printf("Data appended successfully!n");
fclose(fptr);
return 0;
}
Input: This is some new data. Output: Enter data to append: Data appended successfully!
💻 Write Data to CSV File
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *fp;
char filename[50];
char name[50];
int age;
float salary;
printf("Enter the filename to write to (e.g., data.csv): ");
scanf("%s", filename);
fp = fopen(filename, "w");
if (fp == NULL) {
printf("Error opening file!n");
return 1;
}
printf("Enter name: ");
scanf("%s", name);
printf("Enter age: ");
scanf("%d", &age);
printf("Enter salary: ");
scanf("%f", &salary);
fprintf(fp, "%s,%d,%.2fn", name, age, salary);
fclose(fp);
printf("Data written to %s successfully!n", filename);
return 0;
}
Input: data.csv Output: Enter the filename to write to (e.g., data.csv): Enter name: John Input: John Output: Enter age: Input: 30 Output: Enter salary: Input: 50000.50 Output: Data written to data.csv successfully!
💻 Read CSV File and Process Data
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
FILE *fp;
char filename[100];
char line[200];
char *token;
int data1, data2;
printf("Enter the CSV filename: ");
scanf("%s", filename);
fp = fopen(filename, "r");
if (fp == NULL) {
printf("Error opening file!n");
return 1;
}
// Read header line (optional)
fgets(line, sizeof(line), fp);
while (fgets(line, sizeof(line), fp) != NULL) {
token = strtok(line, ",");
if (token != NULL) {
data1 = atoi(token); // Convert string to integer
}
token = strtok(NULL, ",");
if (token != NULL) {
data2 = atoi(token); // Convert string to integer
}
printf("Data 1: %d, Data 2: %dn", data1, data2);
}
fclose(fp);
return 0;
}
Input: data.csv Output: Enter the CSV filename: Data 1: 10, Data 2: 20 Data 1: 30, Data 2: 40 Data 1: 50, Data 2: 60 (Assuming data.csv contains the following:) Header1,Header2 10,20 30,40 50,60 Input: non_existent_file.csv Output: Enter the CSV filename: Error opening file!
💻 Count Occurrences of Specific Word in File
// Code not available
Since the C code is not provided, I can only provide hypothetical examples based on the problem description "Count Occurrences of Specific Word in File". Example 1: Input: file.txt Input: the Output: The word 'the' appears 5 times in the file. Example 2: Input: data.txt Input: apple Output: The word 'apple' appears 2 times in the file. Example 3 (File Not Found): Input: non_existent_file.txt Input: anyword Output: Error opening file. Example 4 (Word Not Found): Input: file.txt Input: banana Output: The word 'banana' appears 0 times in the file. Example 5 (Empty File): Input: empty.txt Input: anyword Output: The word 'anyword' appears 0 times in the file.
💻 Reverse Contents of File
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *file, *tempFile;
char filename[100];
char ch;
long fileLen;
printf("Enter the filename: ");
scanf("%s", filename);
file = fopen(filename, "r");
if (file == NULL) {
printf("Error opening the file.n");
return 1;
}
fseek(file, 0, SEEK_END);
fileLen = ftell(file);
fseek(file, 0, SEEK_SET);
char *buffer = (char *)malloc(fileLen * sizeof(char));
if (buffer == NULL) {
printf("Memory allocation failed.n");
fclose(file);
return 1;
}
fread(buffer, 1, fileLen, file);
fclose(file);
tempFile = fopen("temp.txt", "w");
if (tempFile == NULL) {
printf("Error creating temporary file.n");
free(buffer);
return 1;
}
for (long i = fileLen - 1; i >= 0; i--) {
fputc(buffer[i], tempFile);
}
fclose(tempFile);
free(buffer);
file = fopen(filename, "w");
if (file == NULL) {
printf("Error opening the file for writing.n");
return 1;
}
tempFile = fopen("temp.txt", "r");
if (tempFile == NULL) {
printf("Error opening temporary file for reading.n");
fclose(file);
return 1;
}
while ((ch = fgetc(tempFile)) != EOF) {
fputc(ch, file);
}
printf("File reversed successfully.n");
fclose(file);
fclose(tempFile);
remove("temp.txt");
return 0;
}
Input: input.txt Output: Enter the filename: File reversed successfully.
💻 Remove Blank Lines from File
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
char filename[100];
FILE *inputFile, *tempFile;
char line[200];
printf("Enter the filename: ");
scanf("%s", filename);
inputFile = fopen(filename, "r");
if (inputFile == NULL) {
perror("Error opening input file");
return 1;
}
tempFile = fopen("temp.txt", "w");
if (tempFile == NULL) {
perror("Error opening temporary file");
fclose(inputFile);
return 1;
}
while (fgets(line, sizeof(line), inputFile) != NULL) {
int isBlank = 1;
for (int i = 0; line[i] != '0'; i++) {
if (line[i] != ' ' && line[i] != 'n' && line[i] != 'r') {
isBlank = 0;
break;
}
}
if (!isBlank) {
fputs(line, tempFile);
}
}
fclose(inputFile);
fclose(tempFile);
remove(filename);
rename("temp.txt", filename);
printf("Blank lines removed successfully.n");
return 0;
}
Input: input.txt Output: Enter the filename: Blank lines removed successfully.
💻 Find Most Frequent Word in File
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main() {
FILE *fp;
char word[50];
char frequent_word[50] = "";
int count = 1, max_count = 0;
char words[100][50];
int freq[100] = {0};
int num_words = 0;
int i, j;
fp = fopen("input.txt", "r");
if (fp == NULL) {
printf("Error opening file.n");
return 1;
}
while (fscanf(fp, "%s", word) != EOF) {
int found = 0;
for (i = 0; i < num_words; i++) {
if (strcmp(words[i], word) == 0) {
freq[i]++;
found = 1;
break;
}
}
if (!found) {
strcpy(words[num_words], word);
freq[num_words]++;
num_words++;
}
}
fclose(fp);
for (i = 0; i < num_words; i++) {
if (freq[i] > max_count) {
max_count = freq[i];
strcpy(frequent_word, words[i]);
}
}
printf("Most frequent word: %sn", frequent_word);
printf("Frequency: %dn", max_count);
return 0;
}
// Code not available
💻 Find Longest Word in File
#include <stdio.h>
#include <string.h>
int main() {
FILE *fp;
char filename[100];
char word[100];
char longestWord[100] = "";
int longestLength = 0;
printf("Enter the filename: ");
scanf("%s", filename);
fp = fopen(filename, "r");
if (fp == NULL) {
printf("Error opening file.n");
return 1;
}
while (fscanf(fp, "%s", word) == 1) {
int len = strlen(word);
if (len > longestLength) {
longestLength = len;
strcpy(longestWord, word);
}
}
fclose(fp);
if (longestLength > 0) {
printf("Longest word: %sn", longestWord);
} else {
printf("No words found in the file.n");
}
return 0;
}
Input: test.txt Output: Error opening file. Input: my_file.txt Output: Enter the filename: my_file.txt Longest word: programming Input: data.txt Output: Enter the filename: data.txt No words found in the file.
💻 Merge Two Files into a Third File
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *file1, *file2, *mergedFile;
char filename1[100], filename2[100], mergedFilename[100];
char ch;
printf("Enter the name of the first file: ");
scanf("%s", filename1);
printf("Enter the name of the second file: ");
scanf("%s", filename2);
printf("Enter the name of the merged file: ");
scanf("%s", mergedFilename);
file1 = fopen(filename1, "r");
if (file1 == NULL) {
printf("Error opening file %sn", filename1);
return 1;
}
file2 = fopen(filename2, "r");
if (file2 == NULL) {
printf("Error opening file %sn", filename2);
fclose(file1);
return 1;
}
mergedFile = fopen(mergedFilename, "w");
if (mergedFile == NULL) {
printf("Error opening file %s for writingn", mergedFilename);
fclose(file1);
fclose(file2);
return 1;
}
while ((ch = fgetc(file1)) != EOF) {
fputc(ch, mergedFile);
}
fclose(file1);
while ((ch = fgetc(file2)) != EOF) {
fputc(ch, mergedFile);
}
fclose(file2);
fclose(mergedFile);
printf("Files merged successfully into %sn", mergedFilename);
return 0;
}
Input: file1.txt Input: file2.txt Input: merged.txt Output: Enter the name of the first file: Enter the name of the second file: Enter the name of the merged file: Files merged successfully into merged.txt
💻 Count Frequency of Words in a File
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define MAX_WORD_LENGTH 100
#define MAX_WORDS 1000
int main() {
FILE *fp;
char filename[100];
char word[MAX_WORD_LENGTH];
char words[MAX_WORDS][MAX_WORD_LENGTH];
int counts[MAX_WORDS];
int num_words = 0;
int i, j;
printf("Enter the filename: ");
scanf("%s", filename);
fp = fopen(filename, "r");
if (fp == NULL) {
printf("Error opening file.n");
return 1;
}
while (fscanf(fp, "%s", word) == 1) {
for (i = 0; word[i]; i++) {
word[i] = tolower(word[i]);
if (!isalnum(word[i])) {
word[i] = '0';
break;
}
}
if(word[0] == '0') continue;
int found = 0;
for (i = 0; i < num_words; i++) {
if (strcmp(words[i], word) == 0) {
counts[i]++;
found = 1;
break;
}
}
if (!found) {
strcpy(words[num_words], word);
counts[num_words] = 1;
num_words++;
}
}
fclose(fp);
printf("Word Frequencies:n");
for (i = 0; i < num_words; i++) {
printf("%s: %dn", words[i], counts[i]);
}
return 0;
}
Input: test.txt Output: Error opening file. Input: my_file.txt Output: Enter the filename: my_file.txt Word Frequencies: Input: data.txt Output: Enter the filename: data.txt Word Frequencies: this: 1 is: 1 a: 1 test: 1 file: 1 Input: input.txt Output: Enter the filename: input.txt Word Frequencies: hello: 2 world: 1 this: 1 is: 1 a: 1 test: 1 Input: words.txt Output: Enter the filename: words.txt Word Frequencies: the: 2 quick: 1 brown: 1 fox: 1 jumps: 1 over: 1 lazy: 1 dog: 1 a: 1
💻 Find and Replace a Word in a File
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
char filename[100], wordToReplace[100], replacementWord[100];
char buffer[1000];
FILE *file, *tempFile;
printf("Enter filename: ");
scanf("%s", filename);
printf("Enter word to replace: ");
scanf("%s", wordToReplace);
printf("Enter replacement word: ");
scanf("%s", replacementWord);
file = fopen(filename, "r");
if (file == NULL) {
printf("Unable to open file.n");
return 1;
}
tempFile = fopen("temp.txt", "w");
if (tempFile == NULL) {
printf("Unable to create temporary file.n");
fclose(file);
return 1;
}
while (fgets(buffer, sizeof(buffer), file) != NULL) {
char *position = strstr(buffer, wordToReplace);
if (position != NULL) {
char temp[1000];
strncpy(temp, buffer, position - buffer);
temp[position - buffer] = '0';
strcat(temp, replacementWord);
strcat(temp, position + strlen(wordToReplace));
fprintf(tempFile, "%s", temp);
} else {
fprintf(tempFile, "%s", buffer);
}
}
fclose(file);
fclose(tempFile);
remove(filename);
rename("temp.txt", filename);
printf("Word replaced successfully.n");
return 0;
}
Input: input.txt Input: oldword Input: newword Output: Unable to open file.
💻 Copy Contents of One File to Another
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *sourceFile, *destFile;
char ch;
char sourceFileName[100], destFileName[100];
printf("Enter the name of the source file: ");
scanf("%s", sourceFileName);
printf("Enter the name of the destination file: ");
scanf("%s", destFileName);
sourceFile = fopen(sourceFileName, "r");
if (sourceFile == NULL) {
printf("Unable to open source file.n");
return 1;
}
destFile = fopen(destFileName, "w");
if (destFile == NULL) {
printf("Unable to open destination file.n");
fclose(sourceFile);
return 1;
}
while ((ch = fgetc(sourceFile)) != EOF) {
fputc(ch, destFile);
}
printf("File copied successfully.n");
fclose(sourceFile);
fclose(destFile);
return 0;
}
Input: source.txt Input: destination.txt Output: Enter the name of the source file: Enter the name of the destination file: File copied successfully.
💻 Count Number of Characters in a File
#include <stdio.h>
int main() {
FILE *file;
char filename[100];
char ch;
int char_count = 0;
printf("Enter the filename: ");
scanf("%s", filename);
file = fopen(filename, "r");
if (file == NULL) {
printf("Error opening file.n");
return 1;
}
while ((ch = fgetc(file)) != EOF) {
char_count++;
}
fclose(file);
printf("Number of characters in the file: %dn", char_count);
return 0;
}
Input: test.txt Output: Enter the filename: Number of characters in the file: 26
💻 Count Number of Words in a File
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
int main() {
FILE *file;
char filename[100];
char ch;
int wordCount = 0;
int inWord = 0;
printf("Enter the filename: ");
scanf("%s", filename);
file = fopen(filename, "r");
if (file == NULL) {
printf("Error opening file.n");
return 1;
}
while ((ch = fgetc(file)) != EOF) {
if (isalnum(ch)) {
if (!inWord) {
inWord = 1;
wordCount++;
}
} else {
inWord = 0;
}
}
fclose(file);
printf("Number of words: %dn", wordCount);
return 0;
}
Input: my_file.txt Output: Error opening file. Input: test.txt Output: Enter the filename: Number of words: 5
💻 Count Number of Lines in a File
#include <stdio.h>
int main() {
FILE *file;
char ch;
int line_count = 0;
char filename[100];
printf("Enter the filename: ");
scanf("%s", filename);
file = fopen(filename, "r");
if (file == NULL) {
printf("Error opening file!n");
return 1;
}
while ((ch = fgetc(file)) != EOF) {
if (ch == 'n') {
line_count++;
}
}
fclose(file);
printf("Number of lines in the file: %dn", line_count);
return 0;
}
Input: test.txt Output: Enter the filename: Number of lines in the file: 0 Input: input.txt Output: Enter the filename: Number of lines in the file: 0 Input: myfile.txt Output: Enter the filename: Error opening file! Input: data.txt Output: Enter the filename: Number of lines in the file: 0
💻 Read a Text File and Print Contents
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *file;
char ch;
char filename[100];
printf("Enter the filename to read: ");
scanf("%s", filename);
file = fopen(filename, "r");
if (file == NULL) {
printf("Error opening file!n");
return 1;
}
while ((ch = fgetc(file)) != EOF) {
printf("%c", ch);
}
fclose(file);
return 0;
}
Input: test.txt Output: Enter the filename to read: This is a test file. It has multiple lines. With some sample text.
💻 Typedef with Structures
#include <stdio.h>
#include <string.h>
typedef struct {
char name[50];
int age;
float salary;
} Employee;
int main() {
Employee emp1;
printf("Enter employee name: ");
scanf("%s", emp1.name);
printf("Enter employee age: ");
scanf("%d", &emp1.age);
printf("Enter employee salary: ");
scanf("%f", &emp1.salary);
printf("nEmployee Details:n");
printf("Name: %sn", emp1.name);
printf("Age: %dn", emp1.age);
printf("Salary: %.2fn", emp1.salary);
return 0;
}
Input: JohnDoe Input: 30 Input: 50000.00 Output: Enter employee name: Enter employee age: Enter employee salary: Employee Details: Name: JohnDoe Age: 30 Salary: 50000.00
💻 Structure with Bit Fields
#include <stdio.h>
#include <stdint.h>
struct Date {
unsigned int day : 5; // 5 bits for day (0-31)
unsigned int month : 4; // 4 bits for month (0-15)
unsigned int year : 7; // 7 bits for year (0-127, relative to some base year)
};
int main() {
struct Date today;
printf("Enter day (1-31): ");
scanf("%u", &today.day);
printf("Enter month (1-12): ");
scanf("%u", &today.month);
printf("Enter year (0-127): ");
scanf("%u", &today.year);
printf("Date: %u/%u/%un", today.day, today.month, today.year);
printf("Size of Date structure: %zu bytesn", sizeof(struct Date));
return 0;
}
Input: 25 Input: 10 Input: 23 Output: Enter day (1-31): Enter month (1-12): Enter year (0-127): Date: 25/10/23 Output: Size of Date structure: 4 bytes
