convert.c

#include <stdio.h>
#include <stdlib.h>

#define FALSE 0
#define TRUE 1
#define NULL 0

#define maxsize 10

typedef int datatype;

typedef struct SqStack{
    datatype data[maxsize];
    int top;
}SqStack;

SqStack *Push(SqStack *S, datatype e) {
    S->data[++S->top] = e;
    return S;
}

int Empty(SqStack *S) {
    if (S->top < 0)
        return TRUE;
    else
        return FALSE;
}

datatype Pop(SqStack *S, datatype *e) {
    *e = S->data[S->top--];
    return *e;
}

void init(SqStack *S) {
    S->top = -1;
}

void conversion(unsigned int num) {
    SqStack S;
    
    init(&S);
    
    while (num != 0) {
        Push(&S, num%8);
        num = num/8;
    }
    
    while (!Empty(&S)) {
        int e;
        Pop(&S, &e);
        printf("%d", e);
    }
}

int main()
{
    unsigned int num;
    
    printf("\n请输入一个十进制数!\n");
    scanf("%d", &num);
    conversion(num);
    getchar();
    
    return 0;
}