More examples

2 files changed, 9 insertions, 4 deletions

diff --git a/README b/README
index b627bfd..f7de6a6 100644
--- a/README
+++ b/README
@@ -9,7 +9,7 @@ All data cells are zeros initially
 Options (defaults are in brackets):
    -s num         stack size (128)
    -d num         data size (30000)
-   -t             trace execution for debug
+   -t             trace execution for debugging
 
 Formats for operators '.' and ',' (output and input):
    -c, -i, -u, -o, -x  char, signed int, unsigned int, octal, hexadecimal
@@ -28,8 +28,11 @@ Extensions:
             ;     - end of code (useful when reading stdin)
             #     - comment to the end of line (useful when reading files)
 
-Example:
+Examples:
  echo '+++[.-]' | ./brainfuck # count down from 3 to 1
  echo ',+++.;5' | ./brainfuck # shows 8
  echo ',>,<[->+<]>.;4 5' | ./brainfuck # shows 4+5=9
  echo 'c,u.;h' | ./brainfuck # shows 104 (ASCII code for 'h')
+ echo ', [-[->+<]>];4' | ./brainfuck -t # move data pointer by 4 
+ echo ',>,< [> [->+<] < -[->+<]> ]; 3 7' | ./brainfuck -t # move '7' by 3 
+
diff --git a/brainfuck.c b/brainfuck.c
index d23ae52..47bc60e 100644
--- a/brainfuck.c
+++ b/brainfuck.c
@@ -249,7 +249,7 @@ void usage(char * self)
     printf("Options (defaults are in brackets):\n");
     printf("   -s num         stack size (%u)\n", stack_size);
     printf("   -d num         data size (%u)\n", data_size);
-    printf("   -t             trace execution for debug\n");
+    printf("   -t             trace execution for debugging\n");
     printf("\n");
     printf("Formats for operators '.' and ',' (output and input):\n");
     printf("   -c, -i, -u, -o, -x  char, signed int, unsigned int, octal, hexadecimal\n");
@@ -268,11 +268,13 @@ void usage(char * self)
     printf("            ;     - end of code (useful when reading stdin)\n");
     printf("            #     - comment to the end of line (useful when reading files)\n");
     printf("\n");
-    printf("Example:\n");
+    printf("Examples:\n");
     printf(" echo '+++[.-]' | %s # count down from 3 to 1\n", self);
     printf(" echo ',+++.;5' | %s # shows 8\n", self);
     printf(" echo ',>,<[->+<]>.;4 5' | %s # shows 4+5=9\n", self);
     printf(" echo 'c,u.;h' | %s # shows 104 (ASCII code for 'h')\n", self);
+    printf(" echo ', [-[->+<]>];4' | %s -t # move data pointer by 4 \n", self);
+    printf(" echo ',>,< [> [->+<] < -[->+<]> ]; 3 7' | %s -t # move '7' by 3 \n\n", self);
 
     exit(EXIT_SUCCESS);
 }