Sure! Here is a step-by-step guide to writing a C program that opens an existing file "My.TXT", reads its content, and displays it:

Include the necessary header files:

#include <stdio.h>

Declare the main function:

int main() { // Code goes here return 0; }

Declare a file pointer variable to hold the reference to the file:

FILE *file;

Open the file using the fopen function:

file = fopen("My.TXT", "r");

Note: The second argument "r" specifies that the file is opened in read mode.

Check if the file was opened successfully:

if (file == NULL) { printf("Failed to open the file.\n"); return 1; }

Read the content of the file using a loop:

char ch; while ((ch = fgetc(file)) != EOF) { printf("%c", ch); }

Close the file using the fclose function:

fclose(file);

Complete the main function and the program:

int main() { FILE *file; file = fopen("My.TXT", "r"); if (file == NULL) { printf("Failed to open the file.\n"); return 1; } char ch; while ((ch = fgetc(file)) != EOF) { printf("%c", ch); } fclose(file); return 0; }

That's it! This program will open the file "My.TXT", read its content, and display it on the console.

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Question

Sure! Here is a step-by-step guide to writing a C program that opens an existing file "My.TXT", reads its content, and displays it:

1. Include the necessary header files:
```c
#include <stdio.h>
```

2. Declare the main function:
```c
int main() {
    // Code goes here
    return 0;
}
```

3. Declare a file pointer variable to hold the reference to the file:
```c
FILE *file;
```

4. Open the file using the `fopen` function:
```c
file = fopen("My.TXT", "r");
```
Note: The second argument "r" specifies that the file is opened in read mode.

5. Check if the file was opened successfully:
```c
if (file == NULL) {
    printf("Failed to open the file.
");
    return 1;
}
```

6. Read the content of the file using a loop:
```c
char ch;
while ((ch = fgetc(file)) != EOF) {
    printf("%c", ch);
}
```

7. Close the file using the `fclose` function:
```c
fclose(file);
```

8. Complete the main function and the program:
```c
int main() {
    FILE *file;
    file = fopen("My.TXT", "r");
    if (file == NULL) {
        printf("Failed to open the file.
");
        return 1;
    }
    char ch;
    while ((ch = fgetc(file)) != EOF) {
        printf("%c", ch);
    }
    fclose(file);
    return 0;
}
```

That's it! This program will open the file "My.TXT", read its content, and display it on the console.

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