Moving columns in a bidemensional array in C - c

Question

Hello I have a bidimensional array initiated the following way:
#include <stdio.h>
#include <stdlib.h>
int main(){
char matriz[6][5]={
{'F','H','V','D','U'},
{'E','L','Q','U','E'},
{'P','E','R','S','E'},
{'V','E','R','A','A'},
{'L','C','A','N','Z'},
{'A','Z','Z','Z','Z'}};
system("pause");
}
And I need to move the columns, ordering alphabetically the first line,
I mean, the line that contains {'F','H','V','D','U'}.
I need the following output:
char matriz[6][5]={
{'D','F','H','U','V'},
{'U','E','L','E','Q'},
{'S','P','E','E','R'},
{'A','V','E','A','R'},
{'N','L','C','Z','A'},
{'Z','A','Z','Z','Z'}};
I know I need to use the selective ordering method and a cycle of fors, but I am not sure how.

Answer 1

Declare a struct:
typedef struct{
colChar:char;
colIndex:int;
} COL_HEADER;
Make an array of them, same length as row length:
COL_HEADER myColHeaders[5];
Load up each in a loop, colChar as the column header char, colIndex as the column index, 0-4.
Now you can qsort the array with a comparison function that just compares the colChar. The colIndex keeps track of the initial columns. You now know which col needs to go where in the output.
You can then use a couple of loops to copy the source columns to a 'dest' [6][5], using the myColHeaders[5].colIndex to identify the destination column for each source column.

Answer 2

First you have to compare the first elements of each column to all other top elements,if a column's 1st element is greater than the next column's top element then swap both columns.You can also use qsort function in the algorithm header for sorting.
Below is the implementation:
#include <stdio.h>
int main(){
int i,k,j;
char matriz[6][5]={
{'F','H','V','D','U'},
{'E','L','Q','U','E'},
{'P','E','R','S','E'},
{'V','E','R','A','A'},
{'L','C','A','N','Z'},
{'A','Z','Z','Z','Z'}};
for(i=0;i<4;i++)
{
for(k=i+1;k<5;k++)
{
//comparing top elements of columns
if(matriz[0][i]>matriz[0][k])
{
//swapping columns
for(j=0;j<6;j++)
{
int t=matriz[j][i];
matriz[j][i]=matriz[j][k];
matriz[j][k]=t;
}
}
}
}
//display
for(i=0;i<6;i++)
{
for(k=0;k<5;k++)
printf("%c ",matriz[i][k]);
printf("\n");
}
}