60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
#include <stdio.h>
|
|
#include<stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#define STACK_SIZE 10000
|
|
|
|
struct stack{
|
|
float values[STACK_SIZE];
|
|
int size;
|
|
};
|
|
struct stack mystack;
|
|
|
|
void push_stack(struct stack* stack, float value){
|
|
assert(stack->size < STACK_SIZE);
|
|
stack->values[stack->size] = value;
|
|
stack->size += 1;
|
|
}
|
|
float pop_stack(struct stack* stack){
|
|
assert(stack->size > 0);
|
|
float value = stack->values[stack->size-1];
|
|
stack->size -= 1;
|
|
return value;
|
|
}
|
|
void print_stack(struct stack* stack){
|
|
for(int i = 0; i < stack->size; i++)
|
|
printf("%g ", stack->values[i]);
|
|
printf("\n");
|
|
}
|
|
|
|
void process_operations(struct stack* stack){
|
|
char line[STACK_SIZE];
|
|
if(!fgets(line, STACK_SIZE, stdin)){
|
|
printf("Chyba\n");
|
|
return;
|
|
}
|
|
for(int i = 0; line[i] != '\0'; i++){
|
|
if(line[i] >= '0' && line[i] <= '9'){
|
|
char *endptr;
|
|
float val = strtof(&line[i], &endptr);
|
|
push_stack(stack, val);
|
|
print_stack(stack);
|
|
i = endptr - line - 1;
|
|
}
|
|
else if ((line[i] == '*' || line[i] == '+' || line[i] == '-' || line[i] == '/')
|
|
&& stack->size >= 2){
|
|
float b = pop_stack(stack);
|
|
float a = pop_stack(stack);
|
|
float res = (line[i] == '+') ? a + b :
|
|
(line[i] == '-') ? a - b :
|
|
(line[i] == '*') ? a * b :
|
|
(line[i] == '/') ? a / b : 0;
|
|
push_stack(stack, res);
|
|
print_stack(stack);
|
|
}
|
|
}
|
|
}
|
|
int main(void){
|
|
memset(&mystack,0,sizeof(struct stack));
|
|
process_operations(&mystack);
|
|
} |