C语言写一个按照姓名统计快递的函数

这里是一个简单的C语言函数，用于按照姓名统计快递：

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

#define MAX_NAME_LEN 50
#define MAX_RECORDS 100

typedef struct {
    char name[MAX_NAME_LEN];
    int count;
} Record;

void count_deliveries(Record records[], int* num_records, char* name) {
    int i;
    for (i = 0; i < *num_records; i++) {
        if (strcmp(records[i].name, name) == 0) {
            records[i].count++;
            return;
        }
    }
    if (*num_records < MAX_RECORDS) {
        strcpy(records[*num_records].name, name);
        records[*num_records].count = 1;
        (*num_records)++;
    }
}

int main() {
    Record records[MAX_RECORDS];
    int num_records = 0;

    count_deliveries(records, &num_records, "John");
    count_deliveries(records, &num_records, "Mary");
    count_deliveries(records, &num_records, "John");
    count_deliveries(records, &num_records, "Mary");
    count_deliveries(records, &num_records, "Peter");

    int i;
    for (i = 0; i < num_records; i++) {
        printf("%s: %d\n", records[i].name, records[i].count);
    }

    return 0;
}

这个函数使用结构体来记录每个人的姓名和快递数量。count_deliveries函数接受一个记录数组，记录数和一个姓名字符串作为参数。它遍历记录数组，如果找到一个与给定姓名相同的记录，则将其计数器加1。否则，如果记录数未达到最大值，则将新记录添加到数组中。

在主函数中，我们使用count_deliveries函数来记录几个人的快递数量，并使用循环打印每个人的姓名和计数