Tema 23.09.2019 - siruri de caractere

#include <iostream>
#include <string.h>


using namespace std;

int main()
{
    int pb;
    cout << "Nr problemei:"; cin >> pb;
    cin.ignore();
    switch (pb) {
    case 1: {//Var. 57, Sub.2, Pb.4
        char c;
        cout << "Introdu caracterul:"; cin >> c;
        if (strchr("aeiou", c))
            cout << 1;
        else
            cout << 0;

        break;
    }
    case 2: {//Var.58, Sub.2, Pb.5
        char c[50];
        cin.getline(c, 50);
        char litere[40] = "abcdefghijklmnopqrstuvwyz";
        for (int i = 0; i < strlen(c); i++)
            if (strchr(litere, c[i]) == NULL)
                for (int j = i; j < strlen(c); j++)
                    c[j] = c[j + 1];
        cout << c;
        break;
    }
    case 3: {//Var.61, Sub.2, Pb.2
        //Varianta corecta este C
        break;
    }
    case 4: {//Var.62, Sub.2, Pb.5
        char c[255];
        cin.getline(c, 255);
        char v[255];
        for (int i = 0; i < strlen(c); i++)
            if (isupper(c[i])){
                strcpy(c+i, c + i+1);
                i--;
            }

        for (int i=strlen(c); i>=0; i--){
            int maxim = c[i]-'a';
            int ind=i;
            for (int j=0; j<i; j++){
                if ((c[j]-'a')>maxim && c[j]!=' '){
                    maxim=c[j]-'a';
                    ind=j;
                }
            }
            if (c[ind]!=' '){
                char val=c[i];
                c[i]=c[ind];
                c[ind]=val;
            }
        }
        for (int i=0; i<20; i++)
            if (c[i]!=c[i+1] && c[i]!=' ')
                cout<<c[i]<<" ";
        break;
    }
    case 5: {//Var.63, Sub.2, Pb.4
        char s1[20], s2[20];
        cin>>s1>>s2;
        bool ok=true;
        int i=0;
        while(ok){
            if ((s1[i]-'a')>(s2[i]-'a')){
                cout<<s2<<" "<<s1;
                ok=false;
            }
            else
                i++;
        }
        break;
    }
    case 6: {//Var.72, Sub.2, Pb.2
        char x[20]="absolvent";
        char s[20]="absolvent";
        for (int i=0; i<strlen(s); i++)
            if (strcmp(x, s+i)<0)
                strcpy(x, s+i);
        cout<<x;//vent
        break;
    }
    case 7: {//Var.73, Sub.2, Pb.5
        int n;
        cout<<"n="; cin>>n;
        int nrvoc1=0, nrmin;
        char c[255];
        char v[255];
        char fin[255];
        cin.ignore();
        cin.getline(v, 255);
        for (int i=0; i<strlen(v); i++)
            if(strchr("aeiou", v[i]))
                nrvoc1++;
        nrmin=nrvoc1;
        strcpy (fin, v);
        for (int k=1; k<n; k++){
            cin.getline(c, 255);
            int nrvoc=0;
            for (int i=0; i<strlen(c); i++){
                if(strchr("aeiou", c[i]))
                    nrvoc++;
            }
            if (nrvoc<=nrmin){
                nrmin=nrvoc;
                strcpy(fin, c);
            }
        }
        cout<<"Propozitia cu cele mai putine vocale este:"<<fin;
        break;
        }
        case 8:{//var.74, Sub.2, Pb.2
            //Varianta corecta este C
        }
        case 9:{//Var.78, Sub.2, Pb.5
            char text [100]="examenul de bacalaureat si examenul de atestat";
            char cuv[20]="examenul";
            if (strstr(text, cuv)==NULL){
                cout<<"Nu apare";
                return 0;
            }
            char *ind;
            ind=strstr(text, cuv);
            while (ind){
                int p=strlen(text)-strlen(ind)+strlen(cuv);
                for (int i=strlen (text); i>p; i--)
                    text[i]=text[i-1];
            text[p]='?';
            ind=strstr(text+p, cuv);
            }
            cout<<text;
        }
    }

    return 0;
}