My first structure, C (gcc)

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//gcc 5.4.0

#include  <stdio.h>
#include <string.h>

int main(void)
{
typedef struct {
    int account_number;
    char account_type[20];
    char account_holder_name[40];
    double balance;
               } bank_customer;
    bank_customer bank_customers[5];
    int n=5;
    
    bank_customers[0].account_number=1001;
    strcpy(bank_customers[0].account_type,"Checking");
    strcpy(bank_customers[0].account_holder_name,"John Paul");
    bank_customers[0].balance=2100.50;
    
    bank_customers[1].account_number=1002;
    strcpy(bank_customers[1].account_type,"Checking");
    strcpy(bank_customers[1].account_holder_name,"GI Joe");
    bank_customers[1].balance=1000;
    
    bank_customers[2].account_number=1003;
    strcpy(bank_customers[2].account_type,"Checking");
    strcpy(bank_customers[2].account_holder_name,"GI Jane");
    bank_customers[2].balance=1500;
    
    bank_customers[3].account_number=1004;
    strcpy(bank_customers[3].account_type,"Checking");
    strcpy(bank_customers[3].account_holder_name,"Cobra Commander");
    bank_customers[3].balance=4005;
    
    bank_customers[4].account_number=1005;
    strcpy(bank_customers[4].account_type,"Checking");
    strcpy(bank_customers[4].account_holder_name,"Snake Eye");
    bank_customers[4].balance=3005;
    
    for(int i=0;i<n;i++){
        printf("Account Number=%d\n",bank_customers[i].account_number);
                       }
}

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Compilation time: 0.12 sec, absolute running time: 0.14 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 0,26 sec