C/C++语言—成绩管理

这个是可以保存txt文件的代码，将录入的信息保存为txt文件，下次打开后还好有信息。

以下是部分代码

#include
#include 
#include 
#define MAX 100
struct student
{
	char name[20];
	int num;
	double score[3];
	double sum;
};
struct stuSystem
{
	struct student stu[MAX];
	int curSize;
};
struct stuSystem* createSystem()
{
	struct stuSystem* pSystem = (struct stuSystem*)
		calloc(sizeof(struct stuSystem), 1);
	return pSystem;
}
void insertArray(struct stuSystem* pSystem, struct student stuInfo)
{
	if (pSystem->curSize >= MAX)
	{
		printf("无法录入！\n");
		return;
	}
	pSystem->stu[pSystem->curSize] = stuInfo;
	pSystem->curSize++;
}
void printArray(struct stuSystem* pSystem)
{
	printf("姓名\t编号\t数学\t英语\t体育\t总分\n");
	for (int i = 0; i < pSystem->curSize; i++)
	{
		printf("%s\t%d\t", pSystem->stu[i].name, pSystem->stu[i].num);
		for (int j = 0; j < 3; j++)
		{
			printf("%.1lf\t", pSystem->stu[i].score[j]);
		}
		printf("%.1lf\n", pSystem->stu[i].sum);
	}
}
int searchArray(struct stuSystem* pSystem, const char* name)
{
	for (int i = 0; i < pSystem->curSize; i++)
	{
		if (strcmp(pSystem->stu[i].name, name) == 0)
			return i;
	}
	return-1;
}
void deleteArray(struct stuSystem* pSystem, const char* name)
{
	int pos = searchArray(pSystem, name);
	if (pos == -1)
	{
		printf("没找到，无法删除！\n");
	}
	else
	{
		for (int i = pos; i < pSystem->curSize - 1; i++)
		{
			pSystem->stu[i] = pSystem->stu[i + 1];
		}
		pSystem->curSize--;
		printf("删除成功\n");
	}
}
void modifyArray(struct stuSystem* pSystem, const char* name)
{
	int pos = searchArray(pSystem, name);
	if (pos == -1)
	{
		printf("没找到，无法修改！\n");
	}
	else
	{
		printf("请输入该生新的姓名和变化:");
		scanf("%s%d", &pSystem->stu[pos].name,&pSystem->stu[pos].num);
		printf("请输入新3门课成绩:");
		pSystem->stu[pos].sum = 0;
		for (int i = 0; i < 3; i++)
		{
			scanf("%lf", &pSystem->stu[pos].score[i]);
			pSystem->stu[pos].sum += pSystem->stu[pos].score[i];
		}
		printf("修改成功\n");
	}
}
void BubbleSortBySum(struct stuSystem* pSystem)
{
	for (int i = 0; i < pSystem->curSize; i++)
	{
		for (int j = 0; j < pSystem->curSize - i - 1; j++)
		{
			if (pSystem->stu[j].sum < pSystem->stu[j + 1].sum)
			{
				struct student temp = pSystem->stu[j];
				pSystem->stu[j] = pSystem->stu[j + 1];
				pSystem->stu[j + 1] = temp;
			}
		}
	}
}
void inputStu(struct stuSystem* pSystem)
{
	struct student temp;
	printf("请输入学生的姓名和编号:");
	scanf("%s%d", &temp.name,&temp.num);
	printf("请输入3门课成绩:");
	temp.sum = 0;
	for (int i = 0; i < 3; i++)
	{
		scanf("%lf", &temp.score[i]);
		temp.sum += temp.score[i];
	}
	insertArray(pSystem, temp);
}
void saveInfoToFile(struct stuSystem* pSystem, const char* fileName)
{
	FILE* save = fopen(fileName, "w");
	for (int i = 0; i < pSystem->curSize; i++)
	{
		fprintf(save, "%s\t%d\t", pSystem->stu[i].name, pSystem->stu[i].num);
		for (int j = 0; j < 3; j++)
		{
			fprintf(save, "%.1lf\t", pSystem->stu[i].score[j]);
		}
		fprintf(save, "%.1lf\t", pSystem->stu[i].sum);
	}
	fclose(save);
}