find in mat dei2

/*sa se scrie un program ce foloseste un subprog. recursiv cu metoda DEI ce afiseaza pozitia pe care se gaseste un element x in matrice */
#include <iostream>
#define NMAX 100
using namespace std;

void readVar(char varname, int &var) {
    cout << varname << '=';
    cin >> var;
}

void readMat(int &n, int &m, int a[][NMAX]) {
    readVar('n', n);
    readVar('m', m);
    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            cin >> a[i][j];
}

int findInV(int v[], int p, int q, int x) {
    if (p > q)
        return -1;
    int mid = (p + q) / 2;
        if (v[mid] == x)
            return mid;
    int pos = findInV(v, p, mid - 1, x);
    return pos == -1 ? findInV(v, mid + 1, q, x) : pos;
}

void findInM(int a[][NMAX], int p, int q, int x, int m) {
    if (p > q)
        return;
    int mid = (p + q) / 2;
    int pos = findInV(a[mid], 0, m - 1, x);
    if (pos != -1) {
        cout << mid << ' ' << pos << endl;
        return;
    }
    findInM(a, p, mid - 1, x, m);
    findInM(a, mid + 1, q, x, m);
}

int n, m, a[NMAX][NMAX], x;
int main() {
    readMat(n, m, a);
    readVar('x', x);
    findInM(a, 0, n - 1, x, m);
    return 0;
}