#include <stdio.h>

/*----- programa principal -----*/  
int main( )
{int delta=4; 
 int ch;
  
  while ((ch = getchar()) != EOF)
    { 
      ch = (ch + delta) % 256;
      putchar(ch); 
    }
  return(0); 
}

                                                      

#include <stdio.h>

/*----- programa principal -----*/  
int main( )
{int delta=4; 
 char ch;

  ch = getc(stdin); 
  while (ch != (('.'+delta)%256))
    { 
      ch = (ch - delta);
      if (ch < 0) { ch = (256 + ch); }
      putc(ch,stdout); 
      ch = getc(stdin); 
    }
  putc('.',stdout); 
  return(0); 
}

                                                      

#include <stdio.h>

typedef char str[50];

/*----- programa principal -----*/  
int main( )
{int erro,i; 
 str linha;
 char ch;

  while ((erro = scanf("%[^\n]",linha)) != 1) 
     { scanf("\n"); }
  scanf("\n%c",&ch);
  for (i=0; (i<strlen(linha)&&(linha[i]!=ch)); i++) { ;} 
  if (linha[i]==ch) {printf("\nposicao: %d\n",i+1);}
     else {printf("\nnao existe!\n");}
  return(0); 
}

                                                      

#include <stdio.h>

typedef char str[50];

/*----- programa principal -----*/  
int main( )
{int i=0, conta[256]; 
 str linha;
 char ch;

  for(i=0; i<256;i++){
	conta[i]=0;
  }
  while (scanf("%[^\n]",linha) != 1) 
     { scanf("\n"); }
  i = 0; 
  while(i<strlen(linha)){
	conta[linha[i++]]++;
  }
  for(i='a'; i<='z'; i++){
	printf("%c--%d\n", i, conta[i]);
  }
  return(0); 
}

                                                      

#include <stdio.h>

/*----- programa principal -----*/  
int main( )
{int n; 
 int i;

  printf("Inicio da Execucao do 2. Exemplo \n"); 
  scanf("%d",&n); 
  while (n>0)
    { for (i=1; i<=n; i++) { printf("%d ",n); }
      scanf("%d",&n); 
    }
  printf("\n"); 
  printf("Fim da Execucao do 2. Exemplo \n"); 
  return(0);
}

                                                      

#include <stdio.h>

#define MAX 10

/*----- funcoes auxiliares -----*/  
int par( int n )  { return( n%2 == 0 ); }
int impar( int n ){ return( n%2 != 0 ); }

/*----- programa principal -----*/  
int main( )
  { int i=0, a[MAX], max;
    int (*f)( int ); 
    
    scanf("%d",&a[i]); 
    max = a[i++];
    while( i<MAX )
      { 
        scanf("%d",&a[i]);
        if ( a[i]>max ) { max=a[i]; }
        i++;
      }
    if ( par(max) ) { f=par; } else { f=impar; }
    for( i=0; i<max; i++)
      {
        if ( (*f)(a[i]) ) { printf("%d ",a[i]); }
      }
    return( 0 ); 
  } 

#include<stdio.h>

typedef enum dias {
	Dom= 1,
	Seg, 
	Ter,
	Qua,
	Qui,
	Sex,
	Sab
                  }  Dias_Semana;

int main()
{
	Dias_Semana dia;

	printf("Insira um dia da semana (1 a 7): ");
	scanf("%d", &dia);
	switch(dia)
	{
		case Seg:
			printf("E Segunda-Feira.\n");
			break;
		case Ter:
			printf("E Terca-Feira.\n"); 
			break;
		case Qua:
			printf("E Quarta-Feira.\n");
			break;
		case Qui:
			printf("E Quinta-Feira.\n");
			break;
		case Sex:
			printf("E Sexta-Feira.\n");
			break;
		case Sab:
			printf("E Sabado.\n");
			break;
		case Dom:
			printf("E Domingo.\n");
			break;
		default:
			printf("");
	}

	return (0);
	
}

#include <curses.h>

int main(void) {
	// Declare a character variable but INT (because curses want it)
	int c;

	// The first three initialization asked from curses
	initscr();
	cbreak();
	noecho();

	// Note that printf DOES NOT work
	printw("Press 'y' to quit...\n");

	// Look while c not 'y'
	while((c = getch())!='y')
		printw("%c is not a 'y'...\n",c);

	// Make echo for shell, again
	endwin();
}

all: teste.c
	gcc -o teste teste.c -lcurses

ex1: ex1.o 
	gcc -o ex1  ex1.o  

ex1.o: ex1.c 
	gcc  -c   ex1.c

relex1: relex1.tex ex1.c
	latex relex1
	latex relex1
	dvips -o relex1.ps relex1
	ghostview relex1.ps

clear: 
	rm  -f ex1.o relex1.aux relex1.log relex1.dvi relex1.toc

ex3: ex3.o 
	gcc -o ex3  ex3.o  

ex3.o: ex3.c 
	gcc  -c   ex3.c

ex4: ex4.o 
	gcc -o ex4  ex4.o  

ex4.o: ex4.c 
	gcc  -c   ex4.c

testeA: ex3 ex4
	ex3 >a
	ex4 <a

testeB: ex3 ex4
	ex3 | ex4 

clean: 
	rm -f ex3.o ex4.o