Execute Bash Shell Online

#include<stdio.h>
#include<string.h>
void main(){
    char name[20];
    int phone_no[20], opt;
    printf("***PHONE BOOK***");
    printf("\n Select an option: \n 1 add a contact \n 2 edit a contact \n 3, delete a contact \n 4. view contacts 5. exit");
    scanf("%d", &opt);
    printf("end");
    
}