就业洞察：用 C 语言处理就业数据及开发注意要点解析

```c #include <stdio.h> #include <stdlib.h> #include <string.h> #define MAX_PROVINCES 100 #define MAX_NAME_LEN 50 typedef struct { char name[MAX_NAME_LEN]; int employment; } Province; void bubbleSort(Province arr[], int n) { for (int i = 0; i < n - 1; i++) { for (int j = 0; j < n - i - 1; j++) { if (arr[j].employment < arr[j + 1].employment) { Province temp = arr[j]; arr[j] = arr[j + 1]; arr[j + 1] = temp; } } } } int binarySearch(Province arr[], int n, char *target) { int left = 0, right = n - 1; while (left <= right) { int mid = left + (right - left) / 2; int cmp = strcmp(arr[mid].name, target); if (cmp == 0) return mid; if (cmp < 0) left = mid + 1; else right = mid - 1; } return -1; } int main() { FILE *file = fopen("employ-data.txt", "r"); if (!file) { printf("无法打开文件\n"); return 1; } Province provinces[MAX_PROVINCES]; int count = 0; while (fscanf(file, "%s %d", provinces[count].name, &provinces[count].employment) != EOF) { count++; if (count >= MAX_PROVINCES) break; } fclose(file); bubbleSort(provinces, count); printf("排序后的就业数据:\n"); for (int i = 0; i < count; i++) { printf("%s: %d\n", provinces[i].name, provinces[i].employment); } FILE *outFile = fopen("employ-sort.txt", "w"); if (!outFile) { printf("无法创建输出文件\n"); return 1; } for (int i = 0; i < count; i++) { fprintf(outFile, "%s %d\n", provinces[i].name, provinces[i].employment); } fclose(outFile); char query[MAX_NAME_LEN]; char choice; do { printf("\n输入要查询的省市名称: "); scanf("%s", query); int index = binarySearch(provinces, count, query); if (index != -1) { printf("%s的就业人数: %d\n", query, provinces[index].employment); } else { printf("查询不成功\n"); } printf("继续查询? (y/n): "); scanf(" %c", &choice); } while (choice == 'y' || choice == 'Y'); return 0; } ``` 我在以往的开发过程中，碰到过以下几点需要格外小心处理的地方： 文件打开后必须检查是否成功，避免后续操作导致程序崩溃 字符串比较使用strcmp函数时注意返回值含义，0表示相等 动态内存分配后要及时释放，防止内存泄漏 ######[AI写代码神器 | 708点数解答 | 2025-11-30 23:46:37]