#include <stdio.h>
#define rows 3
#define cols 7
int main(void) {
int r, c, r1, c1, r2, c2, n, icols;
float tmp[rows];
float mat[rows][cols] = {
{ 0.5f, 1.4f, 0.5f, 3.1f, 1.4f, 1.4f, 3.1f },
{ 0.5f, 1.4f, 0.5f, 3.1f, 1.4f, 1.4f, 3.1f },
{ 0.5f, 1.4f, 0.5f, 3.1f, 1.4f, 1.4f, 3.1f }
};
icols = n = 0;
for(c = 0; c < cols - icols; c++) {
for(r = 0; r < rows; r++)
tmp[r] = mat[r][c];
for(c1 = c + 1; c1 < cols - icols; c1++) {
for(r1 = 0; r1 < rows; r1++) {
if(mat[r1][c1] == tmp[r1])
n++;
}
if(n == rows) {
for(c2 = c1; c2 < cols - 1 - icols; c2++) {
for(r2 = 0; r2 < rows; r2++)
mat[r2][c2] = mat[r2][c2 + 1];
}
--c1;
++icols;
}
n = 0;
}
}
for(r = 0; r < rows; r++) {
for(c = 0; c < cols - icols; c++)
printf("%.1f ", mat[r][c]);
putchar('\n');
}
return 0;
}