#include <stdio.h>
 
int main() {
    char str[200], result[200];
    int i, j = 0;
 
    // Input string
    printf("Enter a string: ");
    fgets(str, sizeof(str), stdin);
 
    // Remove special characters
    for (i = 0; str[i] != '\0'; i++) {
        // Keep only alphabets, digits, and spaces
        if ((str[i] >= 'A' && str[i] <= 'Z') ||
            (str[i] >= 'a' && str[i] <= 'z') ||
            (str[i] >= '0' && str[i] <= '9') ||
            str[i] == ' ' ||
            str[i] == '\n') {
            result[j++] = str[i];
        }
    }
 
    result[j] = '\0'; // Null terminate the result string
 
    printf("String after removing special characters: %s", result);
 
    return 0;
}