#include <stdio.h>
#include <stdlib.h>  // contem int atoi()
// #include <ctype.h>  // contem int toascii(int)
#define toascii(c)      ((c) & 0177)
int main(){
char *pc, A[100], c;
int j;

printf("difer a-A= %d\n", 'a'-'A');
printf("difer A-a= %d\n", 'A'-'a');

printf("'A'=  %d ", 'A');
printf("'a'=  %d ", 'a');
printf("'1'=  %d\n", '1');

printf("int depois de executar atoi() =  %d\n", atoi("1234"));

printf("\n//");
for(j=32;j<127;j++){
  printf("%3d='%c' ", j,toascii(j));
  if( (j%5==0) ) printf("\n//");
}
printf("\n//");

// 126 ee DEL
// ate' 159 nao da' para exibir 

for(j=160;j<256;j++){
  printf("%3d='%c' ", j,toascii(j));
  if( (j%5==0) ) printf("\n//");
}
printf("\n//");
}

// 32=' '  33='!'  34='"'  35='#' 
// 36='$'  37='%'  38='&'  39='''  40='(' 
// 41=')'  42='*'  43='+'  44=','  45='-' 
// 46='.'  47='/'  48='0'  49='1'  50='2' 
// 51='3'  52='4'  53='5'  54='6'  55='7' 
// 56='8'  57='9'  58=':'  59=';'  60='<' 
// 61='='  62='>'  63='?'  64='@'  65='A' 
// 66='B'  67='C'  68='D'  69='E'  70='F' 
// 71='G'  72='H'  73='I'  74='J'  75='K' 
// 76='L'  77='M'  78='N'  79='O'  80='P' 
// 81='Q'  82='R'  83='S'  84='T'  85='U' 
// 86='V'  87='W'  88='X'  89='Y'  90='Z' 
// 91='['  92='\'  93=']'  94='^'  95='_' 
// 96='`'  97='a'  98='b'  99='c' 100='d' 
//101='e' 102='f' 103='g' 104='h' 105='i' 
//106='j' 107='k' 108='l' 109='m' 110='n' 
//111='o' 112='p' 113='q' 114='r' 115='s' 
//116='t' 117='u' 118='v' 119='w' 120='x' 
//121='y' 122='z' 123='{' 124='|' 125='}' 
//126='~'