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This commit is contained in:
Valér Jakubčo 2021-10-22 01:16:39 +02:00
parent 0361617c0f
commit 1aff928a0d
1 changed files with 106 additions and 79 deletions
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191
cv3/program.c
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@ -1,122 +1,107 @@
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#define STACK_SIZE 10
struct stack{
struct stack{ //definition of STACK struct
float values[STACK_SIZE];
int size;
};
//function which prints contents of stack
void print_stack(struct stack* stack);
//function to append element into stack
void push_stack(struct stack* stack, float value);
//function to delete last element of stack
float pop_stack(struct stack* stack);
//function to sum last 2 operands from stack
void sum(struct stack* stack);
//function to substract last 2 operands from stack
void substract(struct stack* stack);
//function to multiply last 2 operands from stack
void multip(struct stack* stack);
//function to divide last 2 operands from stack
void divis(struct stack* stack);
int main(){
char char_value[STACK_SIZE]; //definition of input array
char char_value[STACK_SIZE];
memset(&char_value,0,STACK_SIZE);
float float_value;
char* ptr;
struct stack myStack;
memset(&myStack,0,sizeof(struct stack));
memset(&char_value,0,STACK_SIZE); //inicialization of input array
float float_value; //variable to which we convert number from input array (char_value[])
char* ptr; //return pointer of fgets
struct stack myStack; //struct myStach of type stack
memset(&myStack,0,sizeof(struct stack)); //initialization of myStruct structure
while(1){
if(myStack.size == 10){
//print_stack(&myStack);
if(myStack.size == 10){ //condition to break the cycle if we have full stack
puts("full stack");
break;
}
//load input into char_value
ptr = fgets(char_value, STACK_SIZE-1, stdin);
if(ptr != NULL){
if(char_value[0] == '\n'){
if(ptr != NULL){ //check if it run ok
if(char_value[0] == '\n'){ //if first char is \n, break the cycle, its the end
puts("no input");
break;
}
/*if(char_value[0] == '0'){
push_stack(&myStack,0);
print_stack(&myStack);
printf("\n");
continue;
}*/
//sum
if(char_value[0] == '+'){
if(myStack.size > 1){
float a = pop_stack(&myStack);
float b = pop_stack(&myStack);
float c = a+b;
push_stack(&myStack, c);
print_stack(&myStack);
printf("\n");
sum(&myStack);
}else{puts("not enough operands"); break;}
}else if(char_value[0] == '-'){
if(myStack.size > 1){
float a = pop_stack(&myStack);
float b = pop_stack(&myStack);
float c = b-a;
push_stack(&myStack, c);
print_stack(&myStack);
printf("\n");
}else{puts("not enough operands"); break;}
}else if(char_value[0] == '*'){
if(myStack.size > 1){
float a = pop_stack(&myStack);
float b = pop_stack(&myStack);
float c = a*b;
push_stack(&myStack, c);
print_stack(&myStack);
printf("\n");
}else{puts("not enough operands"); break;}
} else if(char_value[0] == '/'){
if(myStack.size > 1){
float a = pop_stack(&myStack);
if(a == 0){
printf("division by zero\n");
break;
}else{
float b = pop_stack(&myStack);
float c = b/a;
push_stack(&myStack, c);
print_stack(&myStack);
printf("\n");
}
}else{puts("not enough operands"); break;}
} else if(isdigit(char_value[0]) != 0 ){
float_value = strtof(char_value, NULL);
//printf("float value: %f\n",float_value);
/*if(float_value == 0){
puts("bad input");
break;*/
//} else {
push_stack(&myStack,float_value);
print_stack(&myStack);
printf("\n");
continue;
}
} else {
puts("bad input");
break;
}
} else {
//push_stack(&myStack, float_value);
//print_stack(&myStack);
//printf("\n");
puts("no input");
//substraction
else if(char_value[0] == '-'){
if(myStack.size > 1){
substract(&myStack);
}else{puts("not enough operands"); break;}
}
//multiplication
else if(char_value[0] == '*'){
if(myStack.size > 1){
multip(&myStack);
}else{puts("not enough operands"); break;}
}
//division
else if(char_value[0] == '/'){
if(myStack.size > 1){
divis(&myStack);
}else{puts("not enough operands"); break;}
}
//if its a number
else if(isdigit(char_value[0]) != 0 ){
float_value = strtof(char_value, NULL);
push_stack(&myStack,float_value);
print_stack(&myStack);
printf("\n");
continue;
} else {
puts("bad input"); //if its not digit nor symbol of operation, break cycle, bad input
break;
}
//if theres no further input
} else {
puts("no input");
break;
}
}
return 0;
@ -141,3 +126,45 @@ float pop_stack(struct stack* stack){
return value;
}
void sum(struct stack* stack){
float a = pop_stack(stack);
float b = pop_stack(stack);
float c = a+b;
push_stack(stack, c);
print_stack(stack);
printf("\n");
}
void substract(struct stack* stack){
float a = pop_stack(stack);
float b = pop_stack(stack);
float c = b-a;
push_stack(stack, c);
print_stack(stack);
printf("\n");
}
void multip(struct stack* stack){
float a = pop_stack(stack);
float b = pop_stack(stack);
float c = a*b;
push_stack(stack, c);
print_stack(stack);
printf("\n");
}
void divis(struct stack* stack){
float a = pop_stack(&myStack);
if(a == 0){
printf("division by zero\n");
break;
}else{
float b = pop_stack(&myStack);
float c = b/a;
push_stack(&myStack, c);
print_stack(&myStack);
printf("\n");
}
}