Dear friends,
do you know how to convert the following codes from C++ into C# ?
Thanx for your helps
Duy BK
#include <stdio.h>
#include <stdlib.h>
#define max 100
int isdigit(char ch) {return '0' <= ch && ch <= '9';}
int isoperator(char ch) {return ch == '+' ? 1: -1;}
int ismultsign(char ch) {return ch == '*';}
long eval(char *str)
{
long val = 0;
char sign = '+';
long temp = 0;
int k = 0;
char *ptr = str;
while (*ptr)
{
if (isdigit(*ptr))
temp = temp*10 + *ptr - '0';
else if(!ismultsign(*ptr))
{
val = val + isoperator(sign)*temp;
temp = 0;
sign = *ptr;
}
ptr ++;
}
return val + isoperator(sign)*temp;
}
char *insert(char *str)
{
char *temp = (char *) malloc(2*max);
char *ptr = str;
int k = 0;
while (*ptr)
{
k+=2;
temp[k-2] = *ptr;
temp[k-1] = '*';
ptr ++;
}
temp[k-1] = 0;
return temp;
}
char *removemultsign(char *str)
{
char *temp = (char *) malloc (max);
char *ptr = temp;
while (*str)
{
if(!ismultsign(*str))
{
*ptr = *str;
ptr++;
}
str++;
}
*ptr = 0;
return temp;
}
void Try(char *str, int k, int sum)
{
if (*(str+k))
for (int j = 0; j < 3; j++)
{
char ch = str[k];
if (j==1) str[k] = '-';
else if (j==2) str[k] = '+';
long num = eval(str);
if (num == sum)
{
char *temp = removemultsign(str);
printf("\n%s = %d\n",temp, sum);
free (temp);
}
Try(str,k+2,sum);
str[k] = ch;
}
}
void main()
{
char str[] = "123456789";
char *ptr = insert(str);
Try(ptr,1,12);
free (ptr);
}
