我写了一个栈的基本操作的ds3_seqStack2.cpp文件，函数声明和数据结构定义用了头文件ds3_seqStack2.h，然后写一个test.cpp文件include这个.h文件以调用栈基本函数，但是连接报错，下帖代码，求指教
/***********ds3_seqStack2.cpp************/
#include"stdio.h"
#include"stdlib.h"
#include "ds3_seqStack2.h"
int initStack(SqStack &s,int n) {
    s.data = (char *)malloc(n);
    if(s.data == NULL) {
        printf("space alloction fail\n");
        exit(0);
    }
    s.stackSize = n;
    s.top = -1;
    return 1;
}
int push(SqStack &s,char x) {
    if(s.top == s.stackSize-1) {
        printf("the stack is full\n");
        return 0;
    }
    s.data[++s.top] = x;
    return 1;
}
int pop(SqStack &s,char &x) {
    if(stackEmpty(s)) {
        printf("the stack is empty\n");
        return 0;
    }
    x = s.data[s.top];
    s.top--;
    return 1;
}
int stackEmpty(SqStack s) {
    if(s.top == -1) {
        return 1;
    }
    return 0;
}
int stackLength(SqStack s) {
    return s.top+1;
}
int clearStack(SqStack &s) {
    s.top = 1;
    return 1;
}
void stackTraverse(SqStack s) {
    for(int i=0;i<s.top+1;i++) {
        printf("%-3d",s.data[i]);
    }
    printf("\n");
}
/***********ds3_seqStack2.h************/
#ifndef SEQSTACK2_H
#define SEQSTACK2_H
typedef struct stack {
    char* data;
    int top;
    int stackSize;
}SqStack;
int initStack(SqStack &s,int n);
int push(SqStack &s,char x);
int pop(SqStack &s,char &x);
int stackEmpty(SqStack s);
int clearStack(SqStack &s);
int stackLength(SqStack s);
void stackTraverse(SqStack s);
#endif
/***********test.cpp************/
#include"stdio.h"
#include"ds3_seqStack2.h"
int parenthesesMatch(char* s);
void main() {
    char s[20];
    printf("Please input a expressions\n");
    scanf("%s",s);
    if(parenthesesMatch(s)) {
        printf("parentheses Match\n");
    }else {
        printf("parentheses doesn't Match\n");
    }
}
int parenthesesMatch(char* str) {
    SqStack s;
    char x;
    initStack(s,10);
    while(*str) {
        if(*str == '('|| (*str) == '[') {
            push(s,*str);
            str++;
        }
        else if(*str == ')') {
            if(s.data[s.top] == '(') {
                pop(s,x);
                str++;
            }
            else {
                return 0;
            }
        }
        else if(*str == ']') {
            if(s.data[s.top] == '[') {
                pop(s,x);
                str++;
            }
            else {
                return 0;
            }
        }
        else {
            str++;
        }   
    }
    if(stackEmpty(s)) {
        return 1;
    }else {
        return 0;
    }
}
error LNK2001: unresolved external symbol "int __cdecl stackEmpty(struct stack)" (?stackEmpty@@YAHUstack@@@Z)
error LNK2001: unresolved external symbol "int __cdecl pop(struct stack &,char &)" (?pop@@YAHAAUstack@@AAD@Z)
error LNK2001: unresolved external symbol "int __cdecl push(struct stack &,char)" (?push@@YAHAAUstack@@D@Z)
error LNK2001: unresolved external symbol "int __cdecl initStack(struct stack &,int)" (?initStack@@YAHAAUstack@@H@Z)
fatal error LNK1120: 4 unresolved externals

问题已解决，用vc同时编译2个cpp文件就行