a92877403
Eric Andersen
2003-10-22
Subject
Goetz Bock writes:
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include/usage.h+4 -2
| @@ -280,8 +280,10 @@ | |
| "expression ..." | |
| #define dc_full_usage \ | |
| "This is a Tiny RPN calculator that understands the\n" \ | |
| - | "following operations: +, -, /, *, and, or, not, eor.\n" \ |
| - | "i.e., 'dc 2 2 add' -> 4, and 'dc 8 8 \\* 2 2 + /' -> 16" \ |
| + | "following operations: +, add, -, sub, *, mul, /, div, %, mod, "\ |
| + | "**, exp, and, or, not, eor.\n" \ |
| + | "For example: 'dc 2 2 add' -> 4, and 'dc 8 8 \\* 2 2 + /' -> 16.\n" \ |
| + | "\nOptions:\n" \ |
| "p - Prints the value on the top of the stack, without altering the stack.\n" \ | |
| "f - Prints the entire contents of the stack without altering anything.\n" \ | |
| "o - Pops the value off the top of the stack and uses it to set the output radix.\n" \ | |
miscutils/dc.c+20 -0
| @@ -44,6 +44,13 @@ static void mul(void) | |
| push(pop() * pop()); | |
| } | |
| + | static void power(void) |
| + | { |
| + | double topower = pop(); |
| + | |
| + | push(pow(pop(), topower)); |
| + | } |
| + | |
| static void divide(void) | |
| { | |
| double divisor = pop(); | |
| @@ -51,6 +58,13 @@ static void divide(void) | |
| push(pop() / divisor); | |
| } | |
| + | static void mod(void) |
| + | { |
| + | unsigned int d = pop(); |
| + | |
| + | push((unsigned int) pop() % d); |
| + | } |
| + | |
| static void and(void) | |
| { | |
| push((unsigned int) pop() & (unsigned int) pop()); | |
| @@ -119,10 +133,16 @@ static const struct op operators[] = { | |
| {"mul", mul}, | |
| {"/", divide}, | |
| {"div", divide}, | |
| + | {"**", power}, |
| + | {"exp", power}, |
| + | {"pow", power}, |
| + | {"%", mod}, |
| + | {"mod", mod}, |
| {"and", and}, | |
| {"or", or}, | |
| {"not", not}, | |
| {"eor", eor}, | |
| + | {"xor", eor}, |
| {"p", print_no_pop}, | |
| {"f", print_stack_no_pop}, | |
| {"o", set_output_base}, | |