括号平衡器程序

我通过堆栈制作了一个括号检查程序。其中它将以字符串作为输入，并检查字符串或表达式是否具有相等的编号。左大括号和右大括号。如果是，它将打印“括号平衡”。否则“括号不平衡”。但另一个很奇怪，它只是打印一些随机值，并且不将表达式作为输入，只是自己打印一些垃圾值。这是代码

#include <stdio.h>
#include <string.h>
#include <stdbool.h>


// Structure defining Stack data structure
struct Stack {
    int count;
    char data[50];
} s;

/*
Initializes the count index to 0
*/
void initialize() {
 s.count = 0;
}

/*
 Checks if Stack is Full or not
*/
bool Is_Full() {
    if(s.count > 50)
        return true;
    else
        return false;
}

/*
 Checks if Stack is Empty or not
*/
bool Is_Empty() {
 if(s.count == 0){
     return true;
 }
 else{
     return false;
}
}

/*
 Adds an element to stack and then increment count index
*/
bool push(int num) {
    if (Is_Full())
        return false;
    else {
        s.data[s.count + 1] = num;
        s.count++;
        return true;
    }
}

/*
 Removes count element from stack and decrement count index
*/
bool pop() {
    if (Is_Empty())
        return false;
    else {
        s.count = s.count - 1;
        s.data[s.count+1];
    }
    return true;
}

int main(void) {
    char expression[100];
    int i, len;
    initialize();
    printf("Enter an expression \n");
    printf("%s", &expression);
    len = strlen(expression);
    /*
    # for '{' : we push '{' in stack
    # for '}' : we pop a character from stack. For every '}' there must be one '{' earlier.
                This will ensure that
                ** There are equal number of '{' and '}' characters in string.
                ** For every '{' there is a '}' in input string later.

    */
    for(i = 0; i < len; i++){
        if(expression[i] == '(' || expression[i] == '{' || expression[i] == '['){
            push(expression[i]);
        }
            if(expression[i] == ')' || expression[i] == '}' || expression[i] == ']'){

                pop();
        }
    }

    if(Is_Empty()){
        printf("Parenthesis are balanced\n");
    }
    else{
        printf("Parenthesis are unbalanced\n");
    }
    return 0;
}

and here's the output:-

它打印随机数据的原因是因为你正在打印expression不写入任何内容：

printf("%s", &expression);

所以你实际上并没有读任何内容。你需要使用scanf为了那个原因：

scanf("%s", expression);