Update cv3/program.c

cv3/program.c

@@ -47,17 +47,18 @@ int read(struct stack *s) {
 
     // Read a line of input
     if (fgets(temp, sizeof(temp), stdin) == NULL) {
-        return 0; // Error reading input
+        printf("no input\n");
+        return 0; // Error reading input or end of input
     }
 
     // Check for empty input
     if (strcmp(temp, "\n") == 0) {
-        printf("no input\n");
+        return 1; // Continue to next iteration
-        exit(1); // Exit on empty input
     }
 
     // Check for termination input
     if (strcmp(temp, "end\n") == 0) {
+        printf("no input\n"); // Print "no input" upon end
         return 0; 
     }
 
@@ -67,24 +68,22 @@ int read(struct stack *s) {
     // If it's a number
     if (scan == 1) {
         push_stack(s, value);
-        print_stack(s); // Print the stack after adding
+        print_stack(s);
     } else {
-        // If it's an operator
         switch (temp[0]) {
             case '+':
             case '-':
             case '*':
             case '/': {
-                // Check for sufficient values in the stack
                 if (s->size < 2) {
                     printf("no input\n");
-                    return 1; // Don't exit; continue to next iteration
+                    return 1; // Continue to next iteration
                 }
 
-                float b = pop_stack(s); // Pop the last two values
+                float b = pop_stack(s);
                 float a = pop_stack(s);
-
                 float result;
+
                 switch (temp[0]) {
                     case '+': result = a + b; break;
                     case '-': result = a - b; break;
@@ -92,20 +91,18 @@ int read(struct stack *s) {
                     case '/':
                         if (b == 0) {
                             printf("division by zero\n");
-                            exit(0); // Exit on division by zero
+                            return 1;
                         }
                         result = a / b;
                         break;
                 }
-                push_stack(s, result); // Push the result back onto the stack
+                push_stack(s, result);
-                print_stack(s); // Print the stack after operation
+                print_stack(s);
-                //printf("no input\n"); // Print the "no input" message
+                return 1; // Continue without printing "no input"
-               // exit(0); // Exit the program after the operation
-                break;
             }
             default:
                 printf("bad input\n");
-                exit(0); // Exit on invalid input
+                return 1; // Continue on invalid input
         }
     }