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Codice: Seleziona tutto

#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define N 500



int analizza        (char input[],char stack[],int top,int len);
void input_char     (char str_input[],int n);
void push           (char exp,char stack[],int *top);
int pop             (char exp,char stack[],int *top);


 

void push(char exp,char stack[],int *top)
{
    (*top)++;
    stack[*top]=exp;
    
}

int pop(char exp,char stack[],int *top)
{
    int flag=0;

    if (stack[*top]=='(' && exp==')')
    { 
        flag++; 
        (*top)--;
    }
       
    if (stack[*top]=='[' && exp==']')
    { 
        flag++; 
        (*top)--;
    }
        
        
    if (stack[*top]=='{' && exp=='}')
    { 
        flag++; 
        (*top)--; 
    }

    return flag;
}


int analizza (char input[],char stack[],int top,int len)
{
    int i,res_pop;

    for (i=0; i<len; i++)
    {
        if (input[i]=='(' || input[i]=='[' || input[i]=='{')
            {
                push(input[i],stack,&top);
                
            }

        if (input[i]==')' || input[i]==']' || input[i]=='}')
            {
                if ( (res_pop=pop(input[i],stack,&top))==0)
                    return 0;
            }
    }
    return top;
}

void input_char(char str_input[],int n)
{
    int len;
    fgets(str_input,n,stdin);
    len=strlen(str_input);
    str_input[len-1]='\0';
    
}
       
int main(void)
{
   
    char input[N];
    char stack[N]={0};
    int top=-1;
    int len,res;
 
    puts ("input frase : ");
    input_char(input,N);
    printf ("Espressione da valutare:%s\n", input);

    len=strlen(input);
    res=(analizza(input,stack,top,len));

    if(res==-1)
        {
            puts("Espressione regolare");
        }
    else
    {
        puts("Espressione non regolare");
        
    }

    return 0;
}

Codice: Seleziona tutto

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

int main(int argc, char *argv[])
{
  int fat=12;
  int i;
  int t=1;
  for (i=1; i<fat; i++)
    t=t+t*i;
  printf ("%d\n",t);	
  return 0;
}

Codice: Seleziona tutto

int fattoriale(int n)
{
          if(n == 1 || n == 0)
          {
                 return 1;
          }
          else
          {
               return n*fattoriale(n - 1);
          }
}

Codice: Seleziona tutto

unsigned factotum( unsigned v )
{
    if ( v < 2 ) return 1;
    return v * factotum( v - 1 );
}

Codice: Seleziona tutto

unsigned factotum(unsigned v){
    if ( v < 2 )
        return 1;
    return v * factotum( v - 1 );}