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  1. #include <stdio.h>
  2. int main(){
  3.     int m, n;
  4.     int a[100][100];
  5.     printf("nhap so hang m: ");
  6.     scanf("%d", &m);
  7.     printf("nhap so cot n: ");
  8.     scanf("%d", &n);
  9.     for(int i=0; i<m; i++){
  10.         for(int j=0; j<n; j++){
  11.             printf("a[%d][%d] = ", i, j);
  12.             scanf("%d", &a[i][j]);
  13.         }
  14.     }
  15.     printf("\nma tran vua nhap:\n");
  16.     for(int i = 0; i < m; i++){
  17.         for(int j = 0; j < n; j++){
  18.             printf("%d\t", a[i][j]);
  19.         }
  20.         printf("\n");
  21.     }
  22.     int x;
  23.     int found = 0;
  24.     printf("\nnhap x can tim: ");
  25.     scanf("%d", &x);
  26.     for(int i=0; i<m; i++){
  27.         for(int j=0; j<n; j++){
  28.             if(a[i][j] == x){
  29.                 found = 1;
  30.                 break;
  31.             }
  32.         }
  33.     }
  34.     if(found){
  35.         printf("tim thay %d trong ma tran\n", x);
  36.     } else {
  37.         printf("Khong tim thay %d\n", x);
  38.     }
  39.     if(m == n){
  40.         int sumChinh = 0, sumPhu = 0;
  41.         printf("\ncac phan tu duong cheo chinh: ");
  42.         for(int i = 0; i < n; i++){
  43.             printf("%d ", a[i][i]);
  44.             sumChinh += a[i][i];
  45.         }
  46.         printf("\ntong duong cheo chinh: %d\n", sumChinh);
  47.         printf("cac phan tu duong cheo phu: ");
  48.         for(int i = 0; i < n; i++) {
  49.             printf("%d ", a[i][n - 1 - i]);
  50.             sumPhu += a[i][n - 1 - i];
  51.         }
  52.         printf("\ntong duong cheo phu: %d\n", sumPhu);
  53.     } else {
  54.         printf("\nkphai ma tran vuong nen kco duong cheo!\n");
  55.     }
  56.     return 0;
  57. }
Success #stdin #stdout 0.01s 5352KB
comments (?)
stdin 
Standard input is empty
stdout 
nhap so hang m: nhap so cot n: 
ma tran vua nhap:

nhap x can tim: Khong tim thay 0

cac phan tu duong cheo chinh: 
tong duong cheo chinh: 0
cac phan tu duong cheo phu: 
tong duong cheo phu: 0
https://ideone.com/bsq6mP
language:
C (gcc 8.3)
created:
8 hours ago
visibility:
public

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