Struct 3

#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <stdlib.h>
#define MAKS 20

struct brg {
    char nama[30];
    float jum, hrg, jumhrg;
};

void input(struct brg *in, int *);
void cetak(struct brg *brgs, int);
void bigjum(struct brg [], float *, int);
void highrupiah(struct brg [], float *, int);

main() {
    struct brg data_brg[MAKS];
    int n = 0, pil, i;
    float bj, hr;

    puts("=============== PERCOBAAN 1 PRAKTIKUM STRUCT 3 ===============\n");

    do {
        puts("Pilihan Menu !!\n");
        printf("1. Masukkan barang\n");
        printf("2. Tampilkan data barang\n");
        printf("3. Tampilkan jumlah terbesar\n");
        printf("4. Tampilkan nilai rupiah tertinggi\n");
        printf("0. Keluar\n");
        puts("--------------------------------------------------------------");
        printf("Masukkan pilihan Anda : ");
        fflush(stdin);
        scanf("%d", &pil);
        puts("--------------------------------------------------------------");

        switch(pil) {
            case 1  : input(data_brg, &n); break;
            case 2  : cetak(data_brg, n); break;
            case 3  : bigjum(data_brg, &bj, n);
                  for(i=0;i<n;i++) {
                    if(bj == data_brg[i].jum)
                        printf("%d.   %s\t\t   %g\n", i+1, data_brg[i].nama, data_brg[i].jum);
                  }
                  break;
            case 4  : highrupiah(data_brg, &hr, n);
                  for(i=0;i<n;i++) {
                    if(hr == data_brg[i].hrg)
                    printf("%d.   %s\t\t   %g\n", i+1, data_brg[i].nama, data_brg[i].hrg);
                  }
                  break;
        }
        puts("--------------------------------------------------------------");

    } while(pil);

    getch();
    return 0;
}
void input(struct brg *in, int *k) {
    int i, n, q = 0;

    printf("Masukkan jumlah barang : "); scanf("%d", &n);
    puts("--------------------------------------------------------------");
    for(i=0;i<n;i++) {
        fflush(stdin);
        if(*k == 0) {
            printf("%d. Nama barang\t\t: ", i+1); gets(in[i].nama);
            printf("   Jumlah\t\t: "); scanf("%f", &in[i].jum);
            printf("   Harga satuan\t\t: "); scanf("%f", &in[i].hrg);
            in[i].jumhrg = in[i].jum * in[i].hrg;
        } else {
            q = *k;
            printf("%d. Nama barang\t\t: ", i+1); gets(in[q].nama);
            printf("   Jumlah\t\t: "); scanf("%f", &in[q].jum);
            printf("   Harga satuan\t\t: "); scanf("%f", &in[q].hrg);
            in[q].jumhrg = in[q].jum * in[q].hrg;
        }

        *k += 1;
    }
}
void cetak(struct brg *brgs, int m) {
    int i;

    if(m == 0)
        printf(" Data belum ada! \n");
    else {
        puts("======================== Data Barang =========================");
        puts("No.  Nama\t\t   Jumlah \t  Harga Satuan");
        puts("--------------------------------------------------------------");

        for(i=0;i<m;i++) {
            printf("%d.   %s\t\t   %g\t\t  Rp. %g\n", i+1, brgs[i].nama, brgs[i].jum, brgs[i].hrg);
        }
    }
}
void bigjum(struct brg y[], float *b, int n) {
    int i;

    if(n == 0)
        printf(" Data belum ada! \n");
    else {
        for(i=0;i<n;i++) {
            if(y[i].jum >= *b)
                *b = y[i].jum;
        }
        puts("Barang yang memiliki jumlah terbesar adalah :");
        puts("======================== Data Barang ========================");
        puts("No.  Nama\t\t   Jumlah");
        puts("--------------------------------------------------------------");
    }
}
void highrupiah(struct brg z[], float *c, int o) {
    int i;

    if(o == 0)
        printf(" Data belum ada! \n");
    else {
        for(i=0;i<o;i++) {
            if(z[i].hrg >= *c)
                *c = z[i].hrg;
        }
        puts("Barang yang memiliki nilai rupiah tertinggi adalah :");
        puts("======================== Data Barang ========================");
        puts("No.  Nama\t\t   Harga");
        puts("--------------------------------------------------------------");
    }
}