c - How to allocate the 2d array of pointers using arguments of main function -

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write c program take 2 integers arguments. program should allocate 2d array of characters dynamically, read data, print them, , free array. array dimensions of array taken main arguments. problem in code run , input correct output isn't correct run time error output

    int main (int y,char *x[]){     int i,j,v,b;     v=atoi(x[1]);     b=atoi(x[2]);     char*m[v];      for(i=0;i<v;i++)         m[i]=(char*)malloc(b*sizeof(char));      for(i=0;i<v;i++)         for(j=0;j<b;j++)             scanf("%s",&m[i][j]);      for(i=0;i<v;i++){         for(j=0;j<b;j++)             printf("%s",m[i][j]);     }      return 0; } 

#include <stdio.h> #include <stdlib.h> #include <string.h>  int main (int y,char *x[]){     int i,j,v,b;     v=atoi(x[1]);     b=atoi(x[2]);     char *m[v][b];//allocate 2d array of pointers on stack      for(i=0;i<v;i++){         for(j=0;j<b;j++){             char buff[128];             scanf("%127s", buff);             m[i][j] = malloc(strlen(buff)+1);             strcpy(m[i][j], buff);         }     }      for(i=0;i<v;i++){         for(j=0;j<b;j++){             printf("%s ", m[i][j]);             free(m[i][j]);         }         printf("\n");     }      return 0; }

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