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# include <stdio.h>

# include <stdlib.h>

# include <string.h>

# define LEN 40

typedef struct FourOpe

{

char tmp_LeftNumber[LEN];

char tmp_RightNumber[LEN];

char tmp_Ope;

int LeftValue;

int RightValue;

} FourOpe, *PTR_FourOpe;

PTR_FourOpe createNode()

{

PTR_FourOpe node = (PTR_FourOpe)malloc(sizeof(FourOpe));

if (node == NULL) exit(1);

else {

memset(node, 0, sizeof(FourOpe)); // <- Initiallize 

return node;

}

} // end of PTR_FourOpe function

int main(int argc, char* argv[])

{

if (argc != 2) 

{

printf("Usage : ./filname \"21 + 22\"\n");

exit(1);

}

else // argc == 2

{

PTR_FourOpe startNode = NULL;

startNode = createNode();

free(startNode);

}

return 0;

}