Herşeyi dosyama iki kez yazabilme

Question

Yani bir dosyaya bir maliyet matrisi oluşturmak için kısa bir programım var ama çalıştırdığımda her şey dosyada iki kez gösteriliyor.

#include <cstdlib> 
    #include <fstream> 

    using namespace std; 

    int main(){ 

     int V = rand() % 15 + 5; 
     int graph[V][V]; 
     for(int i = 0; i < V; i++){ 
     for(int j = 0; j < V; j++){ 
     graph[i][j] = rand() % 50; 
     } 
     } 
    for(int i = 0; i < V; i++){ 
     graph[i][i] = 0; 
    } 

    ofstream fout; 
    fout.open("graphTest.txt", ios::app); 

    fout << V << endl; 

    for(int i = 0; i < V; i++){ 
    for(int j = 0; j < V; j++){ 
     fout << graph[i][j] << ", "; 
    } 
    fout << endl; 
    } 

fout.close(); 
return 0; 
} 

Ve burada dosya gösterir budur: İşte

Ben ne

18 
0, 27, 15, 43, 35, 36, 42, 49, 21, 12, 27, 40, 9, 13, 26, 40, 26, 22, 
36, 0, 18, 17, 29, 32, 30, 12, 23, 17, 35, 29, 2, 22, 8, 19, 17, 43, 
6, 11, 0, 29, 23, 21, 19, 34, 37, 48, 24, 15, 20, 13, 26, 41, 30, 6, 
23, 12, 20, 0, 31, 5, 25, 34, 27, 36, 5, 46, 29, 13, 7, 24, 45, 32, 
45, 14, 17, 34, 0, 43, 0, 37, 8, 26, 28, 38, 34, 3, 1, 4, 49, 32, 
10, 26, 18, 39, 12, 0, 36, 44, 39, 45, 20, 34, 28, 17, 1, 47, 2, 17, 
42, 2, 6, 1, 30, 36, 0, 15, 39, 44, 19, 40, 29, 31, 17, 47, 21, 31, 
25, 9, 27, 17, 6, 47, 3, 0, 15, 6, 33, 19, 24, 28, 21, 32, 29, 3, 
19, 20, 18, 8, 15, 40, 49, 46, 0, 18, 45, 46, 1, 21, 5, 29, 38, 14, 
28, 41, 0, 43, 0, 34, 14, 24, 14, 0, 6, 43, 41, 27, 15, 9, 36, 32, 
1, 37, 28, 25, 7, 24, 21, 8, 45, 29, 0, 35, 43, 18, 28, 43, 11, 28, 
29, 26, 4, 43, 13, 13, 38, 6, 40, 4, 18, 0, 38, 19, 17, 17, 46, 24, 
43, 20, 33, 40, 49, 22, 25, 44, 40, 5, 39, 4, 0, 19, 32, 42, 14, 47, 
7, 5, 4, 48, 11, 22, 28, 49, 43, 46, 18, 40, 22, 0, 10, 5, 1, 11, 
30, 28, 5, 20, 36, 44, 26, 22, 15, 8, 16, 32, 8, 24, 0, 12, 24, 0, 
36, 2, 49, 29, 0, 18, 21, 23, 31, 31, 30, 33, 44, 10, 13, 0, 31, 49, 
46, 9, 23, 13, 18, 40, 45, 26, 16, 34, 40, 40, 34, 26, 42, 36, 0, 45, 
6, 29, 18, 37, 12, 48, 22, 9, 9, 36, 10, 42, 37, 6, 1, 13, 22, 0, 
18 
0, 27, 15, 43, 35, 36, 42, 49, 21, 12, 27, 40, 9, 13, 26, 40, 26, 22, 
36, 0, 18, 17, 29, 32, 30, 12, 23, 17, 35, 29, 2, 22, 8, 19, 17, 43, 
6, 11, 0, 29, 23, 21, 19, 34, 37, 48, 24, 15, 20, 13, 26, 41, 30, 6, 
23, 12, 20, 0, 31, 5, 25, 34, 27, 36, 5, 46, 29, 13, 7, 24, 45, 32, 
45, 14, 17, 34, 0, 43, 0, 37, 8, 26, 28, 38, 34, 3, 1, 4, 49, 32, 
10, 26, 18, 39, 12, 0, 36, 44, 39, 45, 20, 34, 28, 17, 1, 47, 2, 17, 
42, 2, 6, 1, 30, 36, 0, 15, 39, 44, 19, 40, 29, 31, 17, 47, 21, 31, 
25, 9, 27, 17, 6, 47, 3, 0, 15, 6, 33, 19, 24, 28, 21, 32, 29, 3, 
19, 20, 18, 8, 15, 40, 49, 46, 0, 18, 45, 46, 1, 21, 5, 29, 38, 14, 
28, 41, 0, 43, 0, 34, 14, 24, 14, 0, 6, 43, 41, 27, 15, 9, 36, 32, 
1, 37, 28, 25, 7, 24, 21, 8, 45, 29, 0, 35, 43, 18, 28, 43, 11, 28, 
29, 26, 4, 43, 13, 13, 38, 6, 40, 4, 18, 0, 38, 19, 17, 17, 46, 24, 
43, 20, 33, 40, 49, 22, 25, 44, 40, 5, 39, 4, 0, 19, 32, 42, 14, 47, 
7, 5, 4, 48, 11, 22, 28, 49, 43, 46, 18, 40, 22, 0, 10, 5, 1, 11, 
30, 28, 5, 20, 36, 44, 26, 22, 15, 8, 16, 32, 8, 24, 0, 12, 24, 0, 
36, 2, 49, 29, 0, 18, 21, 23, 31, 31, 30, 33, 44, 10, 13, 0, 31, 49, 
46, 9, 23, 13, 18, 40, 45, 26, 16, 34, 40, 40, 34, 26, 42, 36, 0, 45, 
6, 29, 18, 37, 12, 48, 22, 9, 9, 36, 10, 42, 37, 6, 1, 13, 22, 0, 

Ben Bunu ios::app ile dosyayı açtıktan iki kez

Answer 1

döngü neden emin değilim bayraklar, böyle bir dosyayı eski bir çalışmadan varolan bir dosyaya ekler:

fout.open("graphTest.txt", ios::app); 
         // ^^^^^^^^ 

önceki çalışmalardan çıkan verilerin üzerine ios::trunc bayrağını kullanarak dosyayı açın: Eğer dosyada aynı diziyi nedenle görüyorsunuz

nedenle: Bir yan not olarak

fout.open("graphTest.txt", ios::trunc); 
         // ^^^^^^^^^^ 

---

müteakip ürünlerin ürünü olarak programınız rastgele jeneratörü başlatmayı kaçırdığınız için. Ör.

seed(time(NULL)); 

kez main() başında.