(C) Getting the 3 minimum elements of an row in a matrix, and choose one randomly -

i've 8x8 matrix, , after choosing row desire, want 3 minimum elements of it, , choose 1 of 3 randomly. thing i'dont know how handle 3 elements. know how minimum element, following code.

int piezas[8][8] = { 0, 2, 2, 5, 3, 2, 1, 1, 0, 4, 5, 2, 4, 3, 0, 0, 0, 4, 2, 2, 1, 2, 3, 2, 0, 3, 1, 5, 1, 2, 3, 4, 2, 5, 6, 5, 3, 1, 2, 7, 8, 2, 0, 0, 0, 2, 1, 1, 1, 2, 2, 1, 1, 6, 3, 4, };  int myrow = 3; // row want analyze int index; int min=0;  (index=0;index<8;index++) {     printf("%d", piezas[myrow][index] );     if(piezas[myrow][index]<min)         min=piezas[myrow][index];     printf("\t\t"); } printf("min: %d", min); 

the output want have is, if initial matrix is:

int piezas[8][8] = { 0, 2, 2, 5, 3, 2, 1, 1, 0, 4, 5, 2, 4, 3, 0, 0, 0, 4, 2, 2, 1, 2, 3, 2, 0, 3, 1, 5, 1, 2, 3, 4, 2, 5, 6, 5, 3, 1, 2, 7, 8, 2, 0, 0, 0, 2, 1, 1, 1, 2, 2, 1, 1, 6, 3, 4, }; 

and choose row number 3:

0, 3, 1, 5, 1, 2, 3, 4, 

the algorithm must choose

0, 1, 1 

and choose randomly 1 of these three.

can give me ideas of how can it? i'm stuck since morning. thanks

#include <stdio.h> #include <stdlib.h> #include <time.h>  #define size_row 8 #define n_min 3   int piezas[size_row][size_row] = { 0, 2, 2, 5, 3, 2, 1, 1, 0, 4, 5, 2, 4, 3, 0, 0, 0, 4, 2, 2, 1, 2, 3, 2, 0, 3, 1, 5, 1, 2, 3, 4, 2, 5, 6, 5, 3, 1, 2, 7, 8, 2, 0, 0, 0, 2, 1, 1, 1, 2, 2, 1, 1, 6, 3, 4, };  int sort(const void *x, const void *y) {   return (*(int*)x - *(int*)y); }  int* sort_array(int* row, int size_row){     int* output = (int*) calloc(size_row, sizeof(int) );     memcpy(output, row, size_row*sizeof(int) ); // copy array     qsort (output, size_row, sizeof (int), sort);      return output;  }  int random_pick(int* array, int size_row){     return array[ rand() % size_row ]; // possible buffer overflow if size_row big. }  int main(void){     srand(time(null));      int myrow = 3; // row want analyze     int* sorted_row = null;       int i,j;       sorted_row = sort_array(piezas[myrow],size_row );      printf("n mins : \n");     for(i=0;i<n_min;i++){         printf(" %d ", sorted_row[i] );     }     printf("\n");      printf("random pick : %d \n", random_pick(sorted_row, n_min) );   }