fputc() fgetc() in C

fputc() in C

Description:

 The fputc() function in C is used to write a single character to a file specified by the stream.

Syntax of fputc() in C:

int fputc(int character, FILE *stream);

The character parameter specifies the character to write, while the stream is a pointer to the FILE object indicating the file stream.

 stream is a pointer to the FILE object that points to the file stream.

Return Value:

 On success, fputc() returns the character written as an unsigned char cast to an int.

 On failure, it returns EOF.

Example:

#include<stdio.h>

int main() {
    FILE *fp;
    
    // Open a file named "output.txt" in write mode
    fp = fopen("output.txt", "w");
    
    // Check if the file opened successfully
    if (fp != NULL) {
        // Write a character 'A' to the file
        fputc('A', fp);
        
        // Write a newline character '\n' to the file
        fputc('\n', fp);
        
        // Close the file
        fclose(fp);
        
        printf("Character written to file successfully.\n");
    } else {
        printf("Error opening file.\n");
    }
    
    return 0;
}

Output:

Error opening file.

fgetc() in C 

Description:

The fgetc() function in C is used to read a single character from a file specified by the stream.

syntax of fgetc()in C:

int fgetc(FILE *stream);

 stream: Pointer to the FILE object that identifies the stream from which to read.

Return Value:

 On success, fgetc() returns the character read as an unsigned char cast to an int.

 On reaching the end-of-file, it returns EOF.

 On failure, it returns EOF.

Example:

#include<stdio.h>

int main() {
    FILE *fp;
    int ch;
    
    // Open a file named "input.txt" in read mode
    fp = fopen("input.txt", "r");
    
    // Check if the file opened successfully
    if (fp != NULL) {
        // Read characters from the file until EOF (End-Of-File) is reached
        while ((ch = fgetc(fp)) != EOF) {
            // Print the read character to the console
            putchar(ch);
        }
        
        // Close the file
        fclose(fp);
        
        printf("\nFile reading completed.\n");
    } else {
        printf("Error opening file.\n");
    }
    
    return 0;
}

Output:

Error opening file.