Programming

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/*******sub***/
void print_message (char argv_t1[])
{
	printf("Usage: %s <required/options : arguments>\n\n", argv_t1);
	printf("required : arguments\n\n");
	printf(" -help : print out command line options.\n\n\n");
}

int main(int argc, char *argv[])
{
char *mem_type; /* memory type */
char *name; /* name of the memory */
int addr; /* address bits */
int data; /* data bits */
int banks; /* number of banks */
int num_entries; /* memory depth */
int i; /* internal variable */
int cren; /* cren variable for special cases */
int y_add; /* y-address bits for ldigram6tri */
int x_add; /* x-address bits for ldigram6tri */
int sdata; /* sdata bits for ldigram6tri */

/* Storing the memory models command line argument data into internal data variable. */
	for (i = 1; i < argc; i++) 
	{
		if (!strcmp ((argv[i]) , "-type"))
		{
			mem_type = argv[i+1];
		/*
		.other 2 options similar to above stncmp
		.
		*/
		}
		else if (argc < 9)
		{
			printf("\nWrong options and/or arguments used.\n");
			printf("Please check Syntax and try again.\n\n");
			print_message(argv[0]);
			return 1;
		}
	}

	/* Selector for the memory type: */

	if (!strcmp(mem_type, "ra2_met")) 
	{ 
		gen_samsung_mem_ra2_met(name, num_entries, addr, data);
	}
	else if (!strcmp (mem_type, "ra2g_met")) 
	{ 
		gen_samsung_mem_ra2_met(name, num_entries, addr, data);
	} 
	else 
	{ 
		printf("Invalid mem_type selected\n");
		printf("Please check Syntax and try again.\n\n");
		print_message(argv[0]);
		return 10;
	}

	return 0;
}

$ gcc testx.c -Wall -Werror
testx.c: In function `main':
testx.c:51: warning: implicit declaration of function `gen_samsung_mem_ra2_met'
testx.c:19: warning: unused variable `banks'
testx.c:22: warning: unused variable `cren'
testx.c:23: warning: unused variable `y_add'
testx.c:24: warning: unused variable `x_add'
testx.c:25: warning: unused variable `sdata'

// a C++ comment

/* a proper C comment */