112 lines
2.2 KiB
C
112 lines
2.2 KiB
C
#include <stdio.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <ctype.h>
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/////////////@@@@@@@@@@@@@@
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#define STACK_SIZE 500
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struct Stack
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{
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float values[STACK_SIZE];
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int size;
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};
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void push_stack(struct Stack* stack, float value);
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float pop_stack(struct Stack* stack);
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int count_stack(struct Stack* stack);
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void push_stack(struct Stack* stack, float value)
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{
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assert(stack->size < STACK_SIZE);
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stack->values[stack->size] = value;
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stack->size += 1;
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}
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float pop_stack(struct Stack* stack)
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{
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assert(stack->size > 0);
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float value = stack->values[stack->size-1];
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stack->size -= 1;
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return value;
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}
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int count_stack(struct Stack* stack)
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{
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}
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void print_stack(struct Stack* stack)
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{
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for (int i=0; i<stack->size; i++)
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{
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printf("%.2f ", stack->values[i]);
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}
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printf("\n");
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}
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int main()
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{
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struct Stack mystack;
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mystack.size=0;
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//memset(&mystack,0,sizeof(struct Stack));
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int err=0;
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char buf[505];
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do
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{
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char* p=fgets(buf, 299, stdin);
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if(p)
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{
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char c=buf[0];
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float op1, op2, rez;
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if(c=='+'||c=='-'||c=='/'||c=='*')
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{
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op2=pop_stack(&mystack);
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op1=pop_stack(&mystack);
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switch(c)
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{
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case '+': rez=op1+op2; break;
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case '-': rez=op1-op2; break;
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case '/':
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if(c=='/' && op2==0)
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{
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err=1;
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printf("division by zero\n");
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}
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else
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rez=op1/op2;
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break;
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case '*': rez=op1*op2; break;
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}
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}
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else
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{
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if(isdigit(c))
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rez=atof(buf);
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else
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{
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err=1;
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printf("bad input\n");
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}
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}
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if(!err)
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{
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push_stack(&mystack, rez);
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print_stack(&mystack);
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}
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}
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else {
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break;
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}
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}while(1);
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if(!err)
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printf("no input\n");
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return 0;
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}
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