12课练习2 3

12/Exercise02.c

@@ -0,0 +1,25 @@
+#include <stdio.h>
+
+int main() {
+    int A[10][10] = {
+        {0,1,2,3,4,5,6,7,8,9},
+        {10,11,12,13,14,15,16,17,18,19},
+        {20,21,22,23,24,25,26,27,28,29},
+        {30,31,32,33,34,35,36,37,38,39},
+        {40,41,42,43,44,45,46,47,48,49},
+        {50,51,52,53,54,55,56,57,58,59},
+        {60,61,62,63,64,65,66,67,68,69},
+        {70,71,72,73,74,75,76,77,78,79},
+        {80,81,82,83,84,85,86,87,88,89},
+        {90,91,92,93,94,95,96,97,98,99}
+    };
+    int input = 0;
+    int i = 0;
+    int sum = 0;
+    scanf("%d", &input);
+    for (i = 0; i < 10; i++) {
+        sum += *(*(A + i) + ((i + input) % 10));
+    }
+    printf("%d\n", sum);
+    return 0;
+}

12/Exercise03.c

@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void output(char* start, char* end) {
+    char* ptr = start + 1;
+    for (;ptr < end; ptr++) {
+        printf("%c",*ptr);
+    }
+    printf("\n");
+}
+
+int main() {
+    char* inputStr = NULL;
+    char* startIndex = NULL;
+    char* p = NULL;
+    char startDelimiter, endDelimiter;
+
+    printf("转译符：");
+    scanf("%c", &startDelimiter);
+    printf("终止符：");
+    scanf(" %c", &endDelimiter);
+    getchar();
+    inputStr = malloc(141);
+    printf("输入文字：");
+    scanf("%[^\n]", inputStr);
+    p = inputStr;
+    while (p - inputStr < strlen(inputStr)) {
+        if (*p == startDelimiter) {
+            startIndex = p;
+        }
+        else if (*p == endDelimiter && startIndex != NULL) {
+            output(startIndex, p);
+            startIndex = NULL;
+        }
+        p++;
+    }
+    return 0;
+}