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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <conio.h>
  4.  
  5.  
  6. int main()
  7. {
  8.  
  9.     printf("Enter size matrix: ");
  10.     int n, cnt=0, temp, next_temp, next_i=0, next_j=0, sign_i=1, sign_j=0;
  11.     int cycle=0;
  12.     scanf("%d", &n);
  13.  
  14.     int**   matrix = (int**) malloc(n*sizeof(int));
  15.     for (int i=0; i<n; i++)
  16.     {
  17.         matrix[i] = (int*)malloc(n*sizeof(int));
  18.         for (int j=0; j<n; j++)
  19.             matrix[i][j] = ++cnt;       
  20.     }
  21.     printf("\nMatrix before overturn:");
  22.     for (int i=0; i<n; i++)
  23.     {
  24.         printf("\n");
  25.         for (int j=0; j<n; j++)
  26.             printf(" %3i",matrix[i][j]);        
  27.     }
  28.  
  29.     // сдвигаем
  30.     for (cycle=0; cycle<n/2; cycle++)
  31.     {
  32.         next_i=cycle; next_j=cycle;
  33.         next_temp=matrix[next_i][next_j];
  34.         for (int i=0; i<4*(n-1-2*cycle); i++)
  35.         {       
  36.             temp=next_temp;
  37.             next_i-=sign_i; next_j-=sign_j;
  38.             if(next_i<cycle)        {   next_i=cycle;   sign_i=0; sign_j=-1;    ++next_j;   /*printf("1 ");*/}
  39.             if(next_j>=n-cycle) {   next_j=n-1-cycle; sign_i=-1; sign_j=0; ++next_i;/*printf("2 ");*/}
  40.             if(next_i>=n-cycle) {   next_i=n-1-cycle; sign_i=0; sign_j=1; --next_j; /*printf("3 ");*/}
  41.             if(next_j<cycle)        {   next_j=cycle;   sign_i=1; sign_j=0; --next_i; /*printf("4 ");*/}
  42.             next_temp=matrix[next_i][next_j];
  43.             matrix[next_i][next_j]=temp;
  44.             //printf("(%i,%i): %i\n",next_i,next_j, matrix[next_i][next_j]);        
  45.         }
  46.     }   
  47.  
  48.     printf("\nMatrix after overturn:");
  49.     for (int i=0; i<n; i++)
  50.     {
  51.         printf("\n");
  52.         for (int j=0; j<n; j++)
  53.             printf(" %3i",matrix[i][j]);        
  54.     }
  55.  
  56.     getch();
  57.     return 0;
  58. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp:3:19: fatal error: conio.h: No such file or directory
 #include <conio.h>
                   ^
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/fixuk6
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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