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step5.c

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+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#define MAX_STUDENTS 3
+#define MAX_LENGTH 40
+
+int main() {
+   char data[MAX_STUDENTS][6][MAX_LENGTH] = {{"10001\0", "11\0", "Zhang\0", "99.5\0", "88.5\0", "89.5\0"},
+                                               {"10002\0", "12\0", "Yang\0", "77.9\0", "56.5\0", "87.5\0"},
+                                               {"10003\0", "11\0", "Liang\0", "92.5\0", "99.0\0", "60.5\0"}};
+    double sum[MAX_STUDENTS];
+    for (int i = 0; i < MAX_STUDENTS; i++) {
+        sum[i] = atof(data[i][3]) + atof(data[i][4]) + atof(data[i][5]);
+    }
+    for (int i = 0; i < MAX_STUDENTS - 1; i++) {
+        for (int j = 0; j < MAX_STUDENTS - 1 - i; j++) {
+            if (atoi(data[j][1]) > atoi(data[j + 1][1])) {
+                for (int k = 0; k < 6; k++) {
+                    char temp[MAX_LENGTH];
+                    strcpy(temp, data[j][k]);
+                    strcpy(data[j][k], data[j + 1][k]);
+                    strcpy(data[j + 1][k], temp);
+                }
+                double tempSum = sum[j];
+                sum[j] = sum[j + 1];
+                sum[j + 1] = tempSum;
+            } else if (atoi(data[j][1]) == atoi(data[j + 1][1]) && sum[j] > sum[j + 1]) {
+                for (int k = 0; k < 6; k++) {
+                    char temp[MAX_LENGTH];
+                    strcpy(temp, data[j][k]);
+                    strcpy(data[j][k], data[j + 1][k]);
+                    strcpy(data[j + 1][k], temp);
+                }
+                double tempSum = sum[j];
+                sum[j] = sum[j + 1];
+                sum[j + 1] = tempSum;
+            }
+        }
+    }
+
+    char deletinfo[MAX_LENGTH];
+    int note = -1;
+    int count = 0;
+    fgets(deletinfo, MAX_LENGTH, stdin);
+    deletinfo[strcspn(deletinfo, "\n")] = '\0';
+    for (int i = 0; i < MAX_STUDENTS; i++) {
+        if (strcmp(data[i][2], deletinfo) == 0) {
+            note = i;
+            break;
+        }
+    }
+    if (note == -1) {
+        for (int i = 0; i < MAX_STUDENTS; i++) {
+            if (strcmp(data[i][0], deletinfo) == 0) {
+                note = i;
+                break;
+            }
+        }
+    }
+
+    if (note!= -1) {
+        printf("Are you sure(yes/no)?");
+        char con;
+        scanf(" %c", &con);
+        if (con == 'y') {
+            for (int a = note; a < MAX_STUDENTS - 1; a++) {
+                for (int b = 0; b < 6; b++) {
+                    strcpy(data[a][b], data[a + 1][b]);
+                }
+            }
+            for (int i = 0; i < MAX_STUDENTS - 1; i++) {
+                for (int j = 0; j < 6; j++) {
+                    printf("%s ", data[i][j]);
+                }
+                printf("\n");
+            }
+        } else if (con == 'n') {
+            for (int i = 0; i < MAX_STUDENTS; i++) {
+                for (int j = 0; j < 6; j++) {
+                    printf("%s ", data[i][j]);
+                }
+                printf("\n");
+            }
+        }
+    } else {
+        for (int i = 0; i < MAX_STUDENTS; i++) {
+            for (int j = 0; j < 6; j++) {
+                printf("%s ", data[i][j]);
+            }
+            printf("\n");
+        }
+    }
+
+    return 0;
+}