#include <stdio.h>
main()
{
    int i,j,m,n,sMain,sAnti,sCol,sMainUp,sMainDown,sAntiUp,sAntiDown;
    int arr[30][30];

    printf("What dimensions of matrix you want?(1 number) ");
    scanf("%d",&m);
    n = m;

    for(i = 0; i < m; i++){
        for(j = 0; j < n; j++){
            printf("Type elements: ");
            printf("Element[%d,%d]: ",i,j);
            scanf("%d",&arr[i][j]);
        }
    }
    for(i = 0; i < m; i++){
        for(j = 0; j < n; j++){
            printf("%d ",arr[i][j]);
        }
        printf("n");
    }
    sMain = 0;
    sAnti = 0;
    sMainUp = 0;
    sMainDown = 0;
    sAntiUp = 0;
    sAntiDown = 0;

    for(i = 0; i < m; i++){
        for(j = 0; j < n; j++){
            if(i == j){
                sMain += arr[i][j];
            }
            if((i + j) == (n - 1)){
                sAnti += arr[i][j];
            }
            if(i < j){
                sMainUp += arr[i][j];
            }
            if(i > j){
                sMainDown += arr[i][j];
            }
            if((i + j) < (n - 1)){
                sAntiUp += arr[i][j];
            }
            if((i + j) > (n - 1)){
                sAntiDown += arr[i][j];
            }
        }
    }
    sCol = 0;
    printf("Sum of what column you want? ");
    scanf("%d",&j);
    for(i = 0; i < m; i++){
        sCol += arr[i][j];
    }
    printf("Sum of main diagonal: %d.n",sMain);
    printf("Sum of anti(counter) diagonal: %d.n",sAnti);
    printf("Sum above main diagonal: %d.n",sMainUp);
    printf("Sum under main diagonal: %d.n",sMainDown);
    printf("Sum above anti diagonal: %d.n",sAntiUp);
    printf("Sum under anti diagonal: %d.n",sAntiDown);
    printf("Sum of %d. column is: %d.",j,sCol);

}