Strangers in C

While looking in some books, I found a C code with this meaning:

#include <stdio.h>

int connect_to_server();

int main(void){
    connect_to_server() && printf("Connection successed\n");
    return 0;
}

int connect_to_server(){
    // do connection staff here
    // if connection successed
    return 1;
}

Actually, It is very similar to bash script!