用基础C语言写一个程序，实现 学生信息录入系统（姓名、年龄、分数），录入信息之后，可以查询

当然，以下是一个基本的C语言程序，实现学生信息的录入和查询功能：

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

#define MAX_STUDENTS 100

struct Student {
    char name[50];
    int age;
    float score;
};

struct Student students[MAX_STUDENTS];
int numStudents = 0;

void addStudent() {
    struct Student newStudent;

    printf("Enter student name: ");
    scanf("%s", newStudent.name);

    printf("Enter student age: ");
    scanf("%d", &newStudent.age);

    printf("Enter student score: ");
    scanf("%f", &newStudent.score);

    students[numStudents] = newStudent;
    numStudents++;

    printf("Student information added successfully!\n");
}

void searchStudent() {
    char searchName[50];
    int found = 0;

    printf("Enter student name to search: ");
    scanf("%s", searchName);

    for (int i = 0; i < numStudents; i++) {
        if (strcmp(students[i].name, searchName) == 0) {
            printf("Student found:\n");
            printf("Name: %s\n", students[i].name);
            printf("Age: %d\n", students[i].age);
            printf("Score: %.2f\n", students[i].score);
            found = 1;
            break;
        }
    }

    if (!found) {
        printf("Student not found!\n");
    }
}

int main() {
    int choice;

    do {
        printf("\n***** Student Information System *****\n");
        printf("1. Add student information\n");
        printf("2. Search student information\n");
        printf("3. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addStudent();
                break;
            case 2:
                searchStudent();
                break;
            case 3:
                printf("Exiting program. Goodbye!\n");
                break;
            default:
                printf("Invalid choice! Please try again.\n");
                break;
        }
    } while (choice != 3);

    return 0;
}

这个程序使用了结构体 `Student` 来存储每个学生的姓名、年龄和分数。`addStudent()` 函数用于录入学生信息，将学生信息存储在 `students` 数组中。`searchStudent()` 函数用于查询学生信息，根据输入的姓名在 `students` 数组中查找匹配的学生。程序通过一个菜单循环让用户选择操作，用户可以选择添加学生信息、查询学生信息或退出程序。

注意：上述代码仅为示例，没有进行输入验证和错误处理。在实际开发中，应该添加适当的输入验证和错误处理机制来提高程序的健壮性。