Exz

#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <stddef.h>
#include <time.h>

typedef struct Matrix{
    int ncolumns;
    int nrows;
    int **c;
} Matrix;

int randomazer (int min, int max){
    int random;
    random = rand();
    random = ((float)random / RAND_MAX)*(max-min)+min;
    return(random);
}

Matrix create (int n, int min, int max){
    Matrix A;
    int i=0,j=0;
    if (( A.c = malloc ( n * sizeof ( int *))) == NULL )
        exit (1);
    for (i = 0; i < n ; i++ ) {
        if (( A.c[i] = malloc ( n * sizeof ( int ))) == NULL )
            exit (2);
    }
    for (i = 0; i < n; i++){
        for ( j = 0; j < n; j++){
            A.c [i][j] = randomazer(min, max);
        }
    }
    A.nrows = n;
    A.ncolumns = n;
    return A;
}

Matrix sum (Matrix A, Matrix B){
    Matrix n;
    n = create (A.nrows, A.ncolumns, 0);
    int i=0, j=0;
    for (i=0; i<A.nrows; i++){
        for ( j=0; j<A.ncolumns; j++){
            n.c[i][j]=A.c[i][j]+B.c[i][j];
        }
    }
    n.nrows;
    n.ncolumns;
    return n;
}

Matrix sum (Matrix A, Matrix B){
    Matrix n;
    n = create (A.nrows, A.ncolumns, 0);
    int i=0, j=0;
    for (i=0; i<A.nrows; i++){
        for ( j=0; j<A.ncolumns; j++){
            n.c[i][j]=A.c[i][j]+B.c[i][j];
        }
    }
    n.nrows;
    n.ncolumns;
    return n;
}

void output (Matrix A){
    int i=0, j=0;
    for (i=0; i<A.nrows; i++){
        for ( j=0; j<A.ncolumns; j++){
            printf ("%d ", A.c [i][j]);
        }
    printf (" \n" );
    }

}

int main (void) {
    srand(time(NULL));
    Matrix A;
    Matrix B;
    Matrix C;
    int n = 4;
    A = create (n, 0, 10);
    B = create (n, 0, 10);
    output (A);
    printf ("\n");
    output (B);
    C = sum(A, B);
    printf ("\n");
    output (C);
    return 0;
}