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R, how to find the number of rows in an object? Please use the which statement

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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#define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #define NAME_LEN 25 #define MAX_PARTS 100 struct part { int number; char name[NAME_LEN + 1]; int on_hand; double price; } inventory[MAX_PARTS]; int num_parts = 0; int find_part(int number); void insert(void); void search(void); void update(void); void print(void); int read_line(char str[], int n); int main(void) { char code; for (;;) { printf("Enter operation code: "); scanf(" %c", &code); while (getchar() != '\n') /* skips to end of line */ ; switch (code) { case 'i': insert(); break; case 's': search(); break; case 'u': update(); break; case 'p': print(); break; case 'q': return 0; default: printf("Illegal code\n"); } printf("\n"); } } int find_part(int number) { int i; for (i = 0; i < num_parts; i++) if…