#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
void exit(int status) {
    static void (*real_exit)(int) = 0;
    if (!real_exit) {
        real_exit = dlsym(RTLD_NEXT, "exit");
    }
    printf("HI");
}

#include "nr.h"
#include "nrutil.h"
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

void print_matrix(int m, int n, float **mat) {
    int i, j;
    for(i = 1; i <= m; i ++) {
        for(j = 1; j <= n; j ++) {
            printf("%6.2f ", mat[i][j]);
        }
        printf("\n");
    }
}

int main() {
    int m, n;
    int i, j;
    FILE *fp = fopen("lineq1.dat", "r");

    if(fp == NULL) {
        printf("Error opening file");
        exit(1);
    }

    fscanf(fp, "%d", &m); /* row */
    fscanf(fp, "%d", &n); /* col */

    float** a = matrix(1, m, 1, n);
    
    for(i = 1;i <= m; i ++) {
        for(j = 1;j <= n; j ++) {
            fscanf(fp, "%f", &a[i][j]);
        }
    }
    float **b = matrix(1, m, 1, 1);
    for(i = 1; i<= m; i++) {
        fscanf(fp, "%f", &b[i][1]);
    }

    fclose(fp);
    print_matrix(m, n, a);
    print_matrix(m, 1, b);
    gaussj(a, n, b, m);
    print_matrix(m, n, a);
    print_matrix(m, 1, b);
    
    
    return 0;
}