a2

a2/program.c

@@ -1,7 +1,85 @@
-#include <stdio.h>
+#include "stdio.h"
+#include "string.h"
 
-int main(){
-	printf ("Hello world\n");
-	return 0;
+struct Stack {
+    char symbol[100];
+    int size;
+};
+
+void pushStack(struct Stack* stack, char symbol){
+    stack->symbol[stack->size] = symbol;
+    stack->size++;
 }
 
+float popStack(struct Stack* stack){
+    char c = stack->symbol[stack->size -1];
+    stack->size -= 1;
+    return c;
+}
+
+int main(){
+
+    char string[50]; //0 - 49
+    char BB[50]; //0 - 49
+
+    struct Stack stack;
+    memset(&stack, 0, sizeof(struct Stack));
+
+    int x = 0;
+
+    scanf("%[^\n]", string);
+
+    strcpy(BB, string);
+    int i = 0;
+
+    while (1){
+
+        if( BB[i] == '[' || BB[i] == '(' || BB[i] == '{' || BB[i] == '<'){
+
+            pushStack(&stack, BB[i]);
+            BB[i] = ' ';
+            x++;
+        }
+
+        if( BB[i] == ']' || BB[i] == ')' || BB[i] == '}' || BB[i] == '>'){
+            if (x == 0){
+                printf ("Read: %s\nUnexpected closing bracket %c in %d\n",string, BB[i], i);
+                return 0;
+            }
+
+            char c = popStack(&stack);
+            if (c =='('){
+                c--;
+            }
+
+            if (c+2 != BB[i]){
+                printf("Read: %s\nCrossed bracket %c in %d, expected %c \n", string, BB[i], i, c+2);
+                return 0;
+            }
+        }
+
+        i++;
+        if (i == strlen(string)) break;
+    }
+
+    if (stack.size > 0){
+
+        printf("Read: %s\nMissing closing brackets: ", string);
+        while (stack.size > 0){
+            char c = popStack(&stack);
+            if (c =='('){
+                c--;
+            }
+            printf("%c", c+2);
+        }
+        printf("\n");
+
+        return 0;
+    }
+
+    printf("Read: %s\nAll brackets OK\n", string);
+
+
+
+    return 0;
+}