Zadaća 4

zadaca 4

1.
#include <stdio.h>
#define e 0.0001
#define br_el 5

double eksponent(double a,int n){
    int i;
    double suma=a;
    for(i=0;i<n-1;i++){
        suma*=a;
    }
    return suma;
}

int main() {
    double nizx[br_el],nizy[br_el];
    double a,b,h,suma=0,temp;
    int i,n,br=0;
    printf("Unesite prvu tacku intervala: ");
    scanf("%lf",&a);
    if(a<=0||a>100){
        printf("Nedozvoljena vrijednost!");
        return 0;
    }
    printf("Unesite drugu tacku intervala: ");
    scanf("%lf",&b);
    if(a>b||b<=0||b>100||(a==b)){
        if(b<=0){
            printf("Nedozvoljena vrijednost!");
        }
        else printf("Neispravan interval!");
        return 0;
    }
    printf("Unesite eksponent: ");
    scanf("%d",&n);
    if(n<-10||n>10){
        printf("Neispravan eksponent!");
        return 0;
    }
    printf("Unesite korak diskretizacije: ");
    scanf("%lf",&h);
    temp = a;     //sve sa a
    i=0;
    do{
        if(i<4){
            nizx[i]=a;
            nizy[i]=eksponent(a,n);
        }

        suma += eksponent(a,n);
        a += h;

        if(b-a<e){
        nizx[br_el-1]=a-h;
        nizy[br_el-1]=eksponent(a-h,n);
        }

        br++;      // za ispis
        i++;
    }while(b-a>e);
    printf("Korak   x               y = f(x)\n");
    printf("----------------------------------\n");
    for(i=0;i<5;i++){
        if(nizx[i]<e) continue;

            if(i<4)
            printf("%5d. %lf %15.5lf\n",i+1,nizx[i],nizy[i]);
            else if(i==4 && br>4){
            printf("(...)\n");
            printf("%5d. %lf %15.5lf\n",br,nizx[i],nizy[i]);
            }
    }
    printf("----------------------------------\n");
    printf("P(x^%d)[%g,%g]= %.6lf (dx=%g)",n,temp,b,suma*h,h);
    return 0;
}

2. ne treba ti

3.
#include <stdio.h>
#define broj_el 200
#define e 0.0001
#include <math.h>
int main()
{
    int c=0,i,j;
    double dc,lc,uc;
    double niz[broj_el] = {0.00};
    while(c<=0||c>100) {
        printf("Unesite broj clanova niza: ");
        scanf("%d",&c);
    }

    printf("Unesite niz: ");
    for(i=0; i<c; i++) {
        scanf("%lf",&niz[i]);
    }

    for(i=0; i<c; i++) {
        if(c==199)
            break;
        if((fabs(niz[i+1]-2*niz[i])<e)&&(i!=c-1)) {
            dc=niz[i+1];
            lc=niz[i];
            uc=(dc+lc)/2;
            for(j=c; j>i+1; j--) {
                niz[j]=niz[j-1];
            }
            niz[i+1]=uc;
            c++;
        }
    }
    printf("Nakon ubacivanja niz glasi: \n");
    for(i=0; i<c; i++) {
        printf("%g ",niz[i]);
    }
    int br[10] = {0};
    int cifra;
    for(i=0; i<c; i++) {
        cifra=((int)(niz[i]*10))%10;
        br[cifra]++;
    }
    for(i=0; i<10; i++) {
        if(br[i]!=0)
            printf("\nCifra %d se ponavlja %d puta.",i,br[i]);
    }
    return 0;
}

4.
#include <stdio.h>
#include <math.h>
#define duzina 25
#define e 0.00000001

int main() {
    double jelovnik[duzina];
    double kombo[25][25] = {{0}};
    int racun[100];
    double temp,snizenje=0,maxracun=0;
    int i=1,j=0,r=0,maxi,maxj,k1,k2,x=1;
    char flush;

    for(i=0;i<duzina;i++){
        scanf("%lf",&jelovnik[i]);
        if(jelovnik[i]<0)
        i--;
    }
    do{
        printf("Unesite kombinaciju: ");
        scanf("%d",&k1);
        if(k1==0) break;
        scanf("%d %lf",&k2,&temp);
        if((temp>=(jelovnik[k1-1]+jelovnik[k2-1])) || (kombo[k1-1][k2-1]!=0 && kombo[k2-1][k1-1]!=0) || k1==k2){
        printf("Neispravna kombinacija!\n");
        }
        else
        {
        kombo[k1-1][k2-1]=temp;
        kombo[k2-1][k1-1]=temp;
        }
    }while(k1!=0);
    do{
    printf("Unesite racun: ");
    for(i=0;i<100;i++){
        scanf("%d",&racun[i]);
        if(i==0 && racun[i]==0)
        return 0;
        if(racun[i]==0)
        break;
        if(jelovnik[racun[i]-1]<e){
            printf("Jelo nije u ponudi\nUnesite racun: ");
            for(i=0;i<r;i++){
                racun[i]=0;
            }
            do{
            flush=getchar();
            }while((flush!='\0')&&(flush!='\n'));
        }
        r++;
    }
    for(i=0;i<r;i++){
        maxracun +=  jelovnik[racun[i]-1];
    }
    for(i=0;i<r;i++){
        snizenje=0;
        if(racun[i]<0) continue;
        for(j=i+1;j<r;j++){
            if(racun[j]<0 || (kombo[racun[i]-1][racun[j]-1])<e) continue;
            if(fabs(jelovnik[racun[i]-1]+jelovnik[racun[j]-1]-kombo[racun[i]-1][racun[j]-1])>snizenje){
                snizenje = jelovnik[racun[i]-1]+jelovnik[racun[j]-1]-kombo[racun[i]-1][racun[j]-1];
                maxi=i;
                maxj=j;
            }
        }
        maxracun-=snizenje;
        racun[maxi]=-2;
        racun[maxj]=-2;
    }
    printf("Ukupan iznos racuna je: %.2lf KM\n",maxracun);
    maxracun=0;
    r=0;
    }while(x!=0);
    return 0;
}