C語言元素計算器

**本程式由C語言實作元素資訊的查詢和分子相對分子質量的計算，**
這是我第一次寫博客，（==本人C語言小白==)由于明天我就要期末考了，代碼寫得很匆忙,
計算分子式時最好不要輸入帶有括號的分子式，
等我期末考完，我會進一步完善這個程式，
最后期待的功能：
1.根據分子量計算化學式 2.進行化學方程式的配平
3.計算溶液的PH，Ka    4.計算質量分數等等
謝謝你的觀看和點評，

#define _CRT_SECURE_NO_WARNINGS   //這行代碼確保vs可以使用scanf    

#include<stdio.h>
#include<string.h>
#include<ctype.h>
//宣告元素結構體
typedef struct Element {
	char symbol[4];
	char name[4];
	float aram;
	float ram;
}Element;
Element element[37];
//存盤元素的有關資訊
char s[37][4] = { "","H","He","Li","Be","B","C","N","O","F","Ne","Na","Mg","Al","Si","P","S",\
"Cl","Ar","K","Ca","Sc","Ti","V","Cr","Mn","Fe","Co","Ni","Cu","Zn","Ga","Ge","As","Se","Br","Kr" };
char n[37][4] = { "","氫","氦","鋰","鈹","硼","碳","氮","氧","氟","氖","鈉","鎂","鋁","硅","磷",\
"硫","氯","氬","鉀","鈣","鈧","鈦" ,"釩","鉻","錳","鐵","鈷","鎳","銅","鋅","鎵","鍺","砷","硒","溴","氪" };
float am[37] = { 0,1.008,4.003,6.941,9.012,10.81,12.01,14.01,16.00,19.00,20.18,22.99,24.31,26.98,28.09,30.97,32.06,\
35.45,39.95,39.10,40.08,44.96,47.87,50.94,52.00,54.94,55.85,58.93,58.69,63.55,65.41,69.72,72.64,74.92,78.96,79.90,83.80 };
float m[37] = { 0,1,4,7,9,10.8,12,14,16,19,20,23,24,27,28,31,32,35.5,40,39,40,45,48,51,52,55,56,59,59,64,65,70,73,75,79,80,84 };
//宣告函式
int search_num(char sym[]);  //根據元素符號回傳原子序數
void print_info(void);       //列印元素資訊
void count_mass(void);       //計算分子質量

int main(void)
{
	//將元素資訊輸入結構體變數
	for (int i = 1; i <= 36; i++)
	{
		strcpy(element[i].symbol, s[i]);
		strcpy(element[i].name, n[i]);
		element[i].aram = am[i];
		element[i].ram = m[i];
	}
	int w;
	printf("************歡迎你使用ZCX元素計算器*************\n");
	printf("************輸入1進入元素查詢******************\n");
	printf("************輸入2進入分子量計算****************\n");
	printf("************輸入0退出程式*********************\n");
	while (1 == scanf("%d", &w)) {
		switch (w)
		{
		case 1:
			print_info();
			break;
		case 2:
			count_mass();
			break;
		case 0:
			printf("謝謝使用！\n");
			return 0;
		default:
			printf("輸入有誤!請重新輸入:\n");
			break;
		}
		printf("請繼續按主選單輸入:\n");
	}
}

int search_num(char sym[])
{

	for (int i = 1; i <= 36; i++)
		if (!strcmp(element[i].symbol, sym))
			return i;
	return 0;
}

void print_info(void)
{
	int k = 1, num = 0;
	char sym[4];
	while (k) {
		int j = 1;
		printf("請輸入你要查詢的元素的英文符號\n");
		scanf("%s", sym);
		num = search_num(sym);
		if (num)printf("你輸入的元素已找到!\n");
		else {
			printf("你輸入的元素不存在!\n請再次輸入!\n");
			continue;
		}
		printf("請輸入你要查詢的資訊:\n");
		printf("************1.元素名稱***************\n");
		printf("************2.精確相對原子質量*******\n");
		printf("************3.相對原子質量***********\n");
		printf("************4.退出該元素查詢*********\n");
		printf("************0.退出查詢系統***********\n");
		while (j) {
			if (1 == scanf("%d", &k) && k >= 0 && k <= 4) {
				switch (k)
				{
				case 1:
					printf("元素名稱:%s\n", element[num].name);
					break;
				case 2:
					printf("精確相對原子質量:%g\n", element[num].aram);
					break;
				case 3:
					printf("相對原子質量:%g\n", element[num].ram);
					break;
				case 4:
					printf("\n");
					j = 0;
					break;
				default:
					printf("謝謝使用!請您慢走!\n");
					goto help;
					break;
				}
			}
			else
			{
				printf("輸入錯誤!請重新輸入!\n");
			}
		}
	help:
		printf("已成功退出!\n");
	}
}

void count_mass(void)
{
	int k = 1;
	while (k) {
		int n = 0, q = 0;       //q表示括號的狀態
		float m = 0, m1 = 0;    //m是分子量，m1是括號內分子量和
		char molecular[20], molecular_symbol[4], ch, th, * p = molecular;
		printf("請正確輸入分子式:\n");
		scanf("%s", molecular);
		while (ch = *p++) {
			th = *p;
			if (ch == '(') {
				q = 1;
				continue;
			}
			if (ch == ')') {
				q = 2;
				continue;
			}
			if (q == 2) {
				m += m1 * (ch - '0');
				m1 = 0;
				continue;
			}
			molecular_symbol[0] = ch;
			molecular_symbol[1] = th;
			molecular_symbol[2] = '\0';
			n = search_num(molecular_symbol);
			if (n)
			{
				th = *(p + 1);
				if (!q) {
					if (isdigit(th)) {
						m += element[n].ram * (th - '0') + m1;
						m1 = 0;
						p += 2;
					}
					else {
						m += element[n].ram + m1;
						m1 = 0;
						p++;
					}
				}
				else {
					if (isdigit(th)) {
						m1 += element[n].ram * (th - '0');
						p += 2;
					}
					else {
						m1 += element[n].ram;
						p++;
					}
				}
			}
			else
			{
				molecular_symbol[1] = '\0';
				n = search_num(molecular_symbol);
				if (n)
				{
					if (!q) {
						if (isdigit(th)) {
							m += element[n].ram * (th - '0') + m1;
							m1 = 0;
							p++;
						}
						else {
							m += element[n].ram + m1;
							m1 = 0;
						}
					}
					else {
						if (isdigit(th)) {
							m1 += element[n].ram * (th - '0');
							p++;
						}
						else
							m1 += element[n].ram;
					}
				}
				else {
					printf("輸入有誤！請重新輸入:\n");
					break;
				}
			}

		}
		printf("%s的相對分子質量為: %g\n", molecular, m);
		printf("您想計算下一個分子嗎？輸入1表示是，0表示否");
		scanf("%d", &k);
	}
}