Top of the Calc.c

#include "defines.h"

/* The interactive calculator simulates a hand-held

calculator. The calculator evaluates expressions

until the user signals halt. An expression

consists of a left operand, an operator, and a right

operand. The left operand is initialized to zero

and is automatically displayed as part of the

prompt for user input. The user inputs the right

operand, an expression that consists of constants

and operators. To halt, the user enters the stop

character '!' as the first operator in the right operand.

*/

int lhs = 0; /* Left-hand side */

char buffer[MaxExp+2]; /* I/O buffer */

static char* ops = "+-*/%!";

void prompt(void),

input (void),

output (void),

update_lhs(void);

int bad_op(char);

This is program calc.c

Previous slide

Next slide

Back to first slide

View graphic version