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  1. #include <stdio.h>
  2. void input(int i, int j, int a[][100])
  3. {
  4.     for (int x = 0; x < i; ++x )
  5.     {
  6.         for (int y = 0; y < j; ++y)
  7.         {
  8.             scanf("%d",&a[x][y]);
  9.         }
  10.     }
  11. }
  12. void mul_arr(int i, int j, int n, int mul[][100], int a[][100], int b[][100])
  13. {
  14.     for (int x = 0; x < i; ++x)
  15.     {
  16.         for(int y = 0; y < n; ++y)
  17.         {
  18.             mul[x][y] = 0;
  19.             for (int z = 0; z < j; ++z)
  20.                 mul[x][y] += (a[x][z] * b[z][y]);
  21.         }
  22.     }
  23. }
  24. void sum_arr(int i, int j, int a[][100], int b[][100], int sum[][100])
  25. {
  26.     for (int x = 0; x < i; ++x)
  27.     {
  28.         for (int y = 0; y < j; ++y)
  29.         {
  30.             sum[x][y] = a[x][y] + b[x][y];
  31.         }
  32.     }
  33. }
  34. void print_sum(int i, int j, int sum[][100])
  35. {
  36.     printf("tong cua 2 ma tran tren:\n");
  37.     for (int x = 0; x < i; ++x)
  38.     {
  39.         for (int y = 0; y < j; ++y)
  40.         {
  41.             printf("%d ",sum[x][y]);
  42.         }
  43.         printf("\n");
  44.     }
  45. }
  46. void print_mul(int i, int n, int mul[][100])
  47. {
  48.     printf("tich cua 2 ma tran tren:\n");
  49.     for (int x = 0; x < i; ++x)
  50.     {
  51.         for (int y = 0; y < n; ++y)
  52.         {
  53.             printf("%d ",mul[x][y]);
  54.         }
  55.         printf("\n");
  56.     }
  57. }
  58. int main()
  59. {
  60.     int i,j;
  61.     int m,n;
  62.     printf("nhap vao so hang cua ma tran a: ");
  63.     scanf("%d",&i);
  64.  
  65.     printf("nhap vao so cot cua ma tran a:");
  66.     scanf("%d",&j);
  67.  
  68.     printf("nhap vao so hang cua ma tran b:");
  69.     scanf("%d",&m);
  70.  
  71.     printf("nhap vao so cot cua ma tran b:");
  72.     scanf("%d",&n);
  73.  
  74.     int a[i][j];
  75.     int b[m][n];
  76.     int mul[100][100];
  77.     int sum[100][100];
  78.  
  79.     printf("nhap cac phan tu cua ma tran a\n");
  80.     input(i,j,a);
  81.     printf("nhap cac phan tu cua ma tran b\n");
  82.     input(m,n,b);
  83.  
  84.     if (m == j)
  85.     {
  86.         mul_arr(i,j,n,mul,a,b);
  87.         print_mul(i,n,mul);
  88.     }
  89.     else
  90.         printf("2 ma tran tren khong the thuc hien phep nhan!\n");
  91.     if (i == m && j == n)
  92.     {
  93.         sum_arr(i,j,a,b,sum);
  94.         print_sum(i,n,sum);
  95.     }
  96.     else
  97.         printf("2 ma tran tren khong the thuc hien phep cong!\n");
  98.  
  99. }
  100.  
Success #stdin #stdout 0.01s 5284KB
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stdin
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Standard input is empty
stdout
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nhap vao so hang cua ma tran a: nhap vao so cot cua ma tran a:nhap vao so hang cua ma tran b:nhap vao so cot cua ma tran b:nhap cac phan tu cua ma tran a
nhap cac phan tu cua ma tran b
tich cua 2 ma tran tren:
tong cua 2 ma tran tren:
https://ideone.com/JpYO5u
language:
C (gcc 8.3)
created:
20 hours ago
visibility:
public

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