0410

0410/1.c

@@ -0,0 +1,16 @@
+#include <math.h>
+#include <stdio.h>
+#define for_i(i, range, inner)                                                 \
+    {                                                                          \
+        int i;                                                                 \
+        for (i = 0; i < range; i++)                                            \
+            inner;                                                             \
+    }
+
+int main() {
+    int n, avg = 0, count = 0;
+    int a[1005];
+    scanf("%d", &n);
+    for_i(i, n, printf("%d ", (int)(600 * cos(i * 0.35))));
+    return 0;
+}

0410/2.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+#ifndef bool
+#define bool int
+#define true 1
+#define false 0
+#endif
+#define putbool(x) (printf("%s", (x) ? "TRUE" : "FALSE"))
+
+int get_char(char *s) {
+    *s = getchar();
+    return *s != EOF && *s != '\n' && *s != '\r';
+}
+
+int main() {
+    char c;
+    while (get_char(&c)) {
+        if (c > 'z' || c < 'a') {
+            putbool(false);
+            return 0;
+        }
+    }
+    putbool(true);
+    return 0;
+}

0410/3.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+int get_char(char *s) {
+    *s = getchar();
+    return *s != EOF && *s != '\n' && *s != '\r';
+}
+
+int main() {
+    char c;
+    int count = 0;
+    while (get_char(&c)) {
+        if (c == ' ') {
+            count++;
+        }
+    }
+    printf("%d\n", count);
+    return 0;
+}

0410/4.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int get_char(char *s) {
+    *s = getchar();
+    return *s != EOF && *s != '\n' && *s != '\r';
+}
+
+int main() {
+    char c;
+    int count = 0;
+    while (get_char(&c)) {
+        count++;
+    }
+    printf("%d\n", count);
+    return 0;
+}

0410/5.c

@@ -0,0 +1,27 @@
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+int main() {
+    int *x;
+    int N, sum = 0;
+    scanf("%d", &N);
+    x = malloc(N * sizeof(int));
+    {
+        int i;
+        for (i = 0; i < N; i++) {
+            x[i] = 100 * sin(i * 0.05);
+        }
+    }
+
+    {
+        int i;
+        for (i = 0; i < N; i++) {
+            sum += x[i];
+        }
+    }
+    printf("%d", sum);
+
+    return 0;
+}

0410/6.c

@@ -0,0 +1,27 @@
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+    float *x;
+    int N;
+    float sum = 0;
+    scanf("%d", &N);
+    x = malloc(N * sizeof(float));
+    {
+        int i;
+        for (i = 0; i < N; i++) {
+            x[i] = 100 * cos(i * 0.01);
+        }
+    }
+
+    {
+        int i;
+        for (i = 0; i < N; i++) {
+            sum += x[i];
+        }
+    }
+    printf("%.2f", sum);
+
+    return 0;
+}

0410/7.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+#define for_i(i, range, inner)                                                 \
+    {                                                                          \
+        int i;                                                                 \
+        for (i = 0; i < range; i++)                                            \
+            inner;                                                             \
+    }
+
+int main() {
+    int a[4][4], *p = (int *)a, n, sum = 0;
+    scanf("%d", &n);
+    for_i(i, 16, p[i] = n + i);
+    for_i(i, 4, {
+        sum += a[i][i];
+        sum += a[i][3 - i];
+    });
+    printf("%d\n", sum);
+    return 0;
+}

0410/8.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+const char month[][5] = {"Jan", "Feb", "Mar",  "Apr", "May", "Jun",
+                         "Jul", "Aug", "Sept", "Oct", "Nov", "Dec"};
+
+int main() {
+    int n, *ptr;
+    scanf("%d", &n);
+    if (n >= 1 && n <= 12) {
+        printf("%s", month[n - 1]);
+    } else {
+        printf("Error");
+    }
+    return 0;
+}