C programming lesson 1:
Insert data into array and display, using for loop
int main(void)
{
int i;
int str[20]; //initial array of size 20
printf("insert data。\n");
// enter the value to str[20]
for (i = 0; i < 20; i++) {
scanf_s("%d", &str[i]);
if (str[i] == -1)
break;
}
//print the array, break when -1 entered
for (i = 0; i < 20; i++) {
if (str[i] == -1)
break;
printf("%d。\n", str[i]);
}
}