Update cv3/program.c

cv3/program.c

@@ -1 +1,88 @@
-//////@@@@@@
+#include <stdio.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#define STACK_SIZE 500
+
+struct Stack
+{
+   float values[STACK_SIZE];
+   int size;
+};
+
+void push_stack(struct Stack* stack, float value);
+float pop_stack(struct Stack* stack);
+int count_stack(struct Stack* stack);
+
+
+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;
+}
+int count_stack(struct Stack* stack)
+{
+
+}
+
+void print_stack(struct Stack* stack)
+{
+    for (int i=0; i<stack->size; i++)
+    {
+        printf("%f/", stack->values[i]);
+    }
+}
+
+
+int main()
+{
+    struct Stack mystack;
+    mystack.size=0;
+    //memset(&mystack,0,sizeof(struct Stack));
+
+
+    char buf[505];
+
+    do
+    {        
+      char* p=fgets(buf, 299, stdin);    
+     
+      if(!p)
+      {        
+        break;
+      }
+      else
+      {
+          char c=buf[0];
+          float op1, op2, rez;
+          if(c=='+'||c=='-'||c=='/'||c=='*')   // -45
+          {
+              op2=pop_stack(&mystack);
+              op1=pop_stack(&mystack);
+              switch(c)
+              {
+                  case '+': rez=op1+op2; break;
+                  case '-': rez=op1-op2; break;
+                  case '/': rez=op1/op2; break;
+                  case '*': rez=op1*op2; break;
+              }                  
+              push_stack(&mystack, rez); 
+              printf(" %.2f\n", rez);
+                  
+          }
+          else 
+            push_stack(&mystack, atof(buf));
+      }  
+
+    }while(1);
+
+	return 0;
+}