#include <stdio.h>
 
int main() {
    FILE *file;
    char filename[100];
    char ch;
    int count = 0;
 
    // Step 1: Get file name from user
    printf("Enter file name: ");
    scanf("%s", filename);
 
    // Step 2: Open file in read mode
    file = fopen(filename, "r");
 
    // Step 3: Check if file exists
    if (file == NULL) {
        printf("Error! Cannot open file.\n");
        return 1;
    }
 
    // Step 4: Read each character until end of file
    while ((ch = fgetc(file)) != EOF) {
        count++;
    }
 
    // Step 5: Display result
    printf("Total number of characters in the file: %d\n", count);
 
    // Step 6: Close file
    fclose(file);
 
    return 0;
}