c语言输出1.设计登录评分系统主界面 2.记录每一个选手信息及10位裁判打分及现场观众和网络观众的投票数 3.实现修改参赛选手信息功能 4.实现删除参赛选手信息功能 5.计算出冠亚季军 结果保存至文件中

以下是一个简单的C语言程序，实现了你提出的要求：

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

// 定义选手结构体
typedef struct {
    char name[20];
    float score[10];
    int audience_vote;
    int online_vote;
    float total_score;
} Player;

// 声明全局变量
Player players[20];
int num_players = 0;

// 主菜单
void main_menu() {
    printf("\n**********欢迎进入评分系统**********\n");
    printf("1. 添加参赛选手\n");
    printf("2. 查看参赛选手\n");
    printf("3. 修改参赛选手信息\n");
    printf("4. 删除参赛选手\n");
    printf("5. 计算冠亚季军并保存结果\n");
    printf("0. 退出评分系统\n");
    printf("请输入数字选择操作：");
}

// 添加参赛选手
void add_player() {
    Player p;
    printf("请输入选手姓名：");
    scanf("%s", p.name);
    printf("请输入10位裁判的打分：");
    for (int i = 0; i < 10; i++) {
        scanf("%f", &p.score[i]);
    }
    printf("请输入现场观众投票数：");
    scanf("%d", &p.audience_vote);
    printf("请输入网络观众投票数：");
    scanf("%d", &p.online_vote);
    p.total_score = 0;
    for (int i = 0; i < 10; i++) {
        p.total_score += p.score[i];
    }
    p.total_score /= 10;
    p.total_score += p.audience_vote + p.online_vote;
    players[num_players++] = p;
    printf("添加成功！\n");
}

// 查看参赛选手
void view_players() {
    printf("目前有%d位参赛选手：\n", num_players);
    for (int i = 0; i < num_players; i++) {
        printf("姓名：%s\t总分：%.2f\n", players[i].name, players[i].total_score);
    }
}

// 修改参赛选手信息
void modify_player() {
    char name[20];
    printf("请输入要修改的选手姓名：");
    scanf("%s", name);
    for (int i = 0; i < num_players; i++) {
        if (strcmp(players[i].name, name) == 0) {
            printf("请输入10位裁判的新打分：");
            for (int j = 0; j < 10; j++) {
                scanf("%f", &players[i].score[j]);
            }
            printf("请输入新的现场观众投票数：");
            scanf("%d", &players[i].audience_vote);
            printf("请输入新的网络观众投票数：");
            scanf("%d", &players[i].online_vote);
            players[i].total_score = 0;
            for (int j = 0; j < 10; j++) {
                players[i].total_score += players[i].score[j];
            }
            players[i].total_score /= 10;
            players[i].total_score += players[i].audience_vote + players[i].online_vote;
            printf("修改成功！\n");
            return;
        }
    }
    printf("未找到该选手！\n");
}

// 删除参赛选手
void delete_player() {
    char name[20];
    printf("请输入要删除的选手姓名：");
    scanf("%s", name);
    for (int i = 0; i < num_players; i++) {
        if (strcmp(players[i].name, name) == 0) {
            for (int j = i; j < num_players - 1; j++) {
                players[j] = players[j + 1];
            }
            num_players--;
            printf("删除成功！\n");
            return;
        }
    }
    printf("未找到该选手！\n");
}

// 比较函数，用于排序
int cmp(const void *a, const void *b) {
    Player *pa = (Player *)a;
    Player *pb = (Player *)b;
    if (pa->total_score < pb->total_score) {
        return 1;
    } else if (pa->total_score > pb->total_score) {
        return -1;
    } else {
        return 0;
    }
}

// 计算冠亚季军并保存结果
void calculate_result() {
    if (num_players < 3) {
        printf("参赛选手不足3人，无法计算结果！\n");
        return;
    }
    qsort(players, num_players, sizeof(Player), cmp);
    FILE *fp = fopen("result.txt", "w");
    fprintf(fp, "冠军：%s\t总分：%.2f\n", players[0].name, players[0].total_score);
    fprintf(fp, "亚军：%s\t总分：%.2f\n", players[1].name, players[1].total_score);
    fprintf(fp, "季军：%s\t总分：%.2f\n", players[2].name, players[2].total_score);
    fclose(fp);
    printf("计算完成！结果已保存至result.txt文件中。\n");
}

int main() {
    int choice;
    while (1) {
        main_menu();
        scanf("%d", &choice);
        switch (choice) {
            case 0:
                printf("谢谢使用评分系统！\n");
                return 0;
            case 1:
                add_player();
                break;
            case 2:
                view_players();
                break;
            case 3:
                modify_player();
                break;
            case 4:
                delete_player();
                break;
            case 5:
                calculate_result();
                break;
            default:
                printf("输入有误，请重新输入！\n");
                break;
        }
    }
}

这个程序使用了结构体存储选手信息，可以实现添加、查看、修改、删除选手信息的功能，并且可以计算出冠亚季军并保存结果至文件中。需要注意的是，该程序仅供参考，实际应用中可能需要根据具体需求进行修改。