Add 3 probs

semester2/pset3/1-filesOps.c

@@ -0,0 +1,111 @@
+#include <stdio.h>
+
+#define FILENAME dict.dic
+#define BUFLEN 65535
+
+void countChar(FILE *fp);
+void countLines(FILE *fp);
+void countCaps(FILE *fp);
+
+int main(void) {
+  FILE *fp = fopen("dict.dic", "r");
+
+  int op;
+  scanf("%d", &op);
+  switch (op) {
+		case (1): {
+			countChar(fp);
+			break;
+		}
+		case (2): {
+			countLines(fp);
+			break;
+		}
+		case (3): {
+			countCaps(fp);
+			break;
+		}
+		default: {
+			break;
+		}
+  }
+
+  fclose(fp);
+  return 0;
+}
+
+void countChar(FILE *fp) {
+  int cap = 0, low = 0, digits = 0, others = 0;
+  char buf;
+  while ((buf = fgetc(fp)) != EOF) {
+    if (buf >= 'A' && buf <= 'Z') {
+      cap++;
+    } else if (buf >= 'a' && buf <= 'z') {
+      low++;
+    } else if (buf >= '0' && buf <= '9') {
+      digits++;
+    } else {
+      others++;
+    }
+  }
+  printf("Task1:\n");
+  printf("capital: %d\n", cap);
+  printf("lowercase: %d\n", low);
+  printf("digit: %d\n", digits);
+  printf("others: %d\n", others);
+}
+void countLines(FILE *fp) {
+  int lines = 0;
+  int maxlen, minlen;
+  int i;
+  char buf[BUFLEN];
+
+  // Firstly read one line
+  fgets(buf, BUFLEN * sizeof(buf[0]), fp);
+  lines++;
+  for (i = 0; buf[i] != '\n'; i++) {
+  }
+  maxlen = i;
+  minlen = i;
+
+  while (fgets(buf, sizeof(buf), fp) != NULL) {
+    lines++;
+    for (i = 0; buf[i] != '\n'; i++) {
+    }
+		if (i > maxlen) {
+			maxlen = i;
+		}
+		if (i < minlen) {
+			minlen = i;
+		}
+  }
+
+	printf("Task2:\n");
+	printf("line: %d\n", lines);
+	printf("%d characters in max line.\n", maxlen);
+	printf("%d characters in min line.\n", minlen);
+}
+void countCaps(FILE *fp) {
+	char low[26] = {};
+	char cap[26] = {};
+
+	char buf;
+	while ((buf = fgetc(fp)) != EOF) {
+		if (buf >= 'a' && buf <= 'z') {
+			low[buf - 'a']++;
+		} else if (buf >= 'A' && buf <= 'Z') {
+			cap[buf - 'A']++;
+		}
+	}
+
+	printf("Task3:\n");
+	printf("CAPITAL:\n");
+	for (int i = 0; i < 26; i++) {
+		printf("%c:%d\n", i + 'A', cap[i]);
+	}
+
+	printf("LOWERCASE:\n");
+	for (int i = 0; i < 26; i++) {
+		printf("%c:%d\n", i + 'a', low[i]);
+	}
+}

semester2/pset3/2-write.c

@@ -0,0 +1,71 @@
+#include <stdio.h>
+
+int main(void) {
+  FILE *fp = fopen("dict.dic", "rb");
+
+  char a,
+      aa[5]; //注意这里数组aa为正常使用的字符串，所以会包含字符'\0'，它不需要输出
+  short b, bb[5];
+  int c, cc[5];
+  long d, dd[5];
+  long long e, ee[5];
+  float g, gg[5];
+  double h, hh[5];
+
+  int n;
+  scanf("%d", &n);
+
+  for (int i = 0; i < n; i++) {
+    fread(&a, sizeof(a), 1, fp);
+    fread(&b, sizeof(b), 1, fp);
+    fread(&c, sizeof(c), 1, fp);
+    fread(&d, sizeof(d), 1, fp);
+    fread(&e, sizeof(e), 1, fp);
+    fread(&g, sizeof(g), 1, fp);
+    fread(&h, sizeof(h), 1, fp);
+    fread(aa, sizeof(a), 5, fp);
+    fread(bb, sizeof(b), 5, fp);
+    fread(cc, sizeof(c), 5, fp);
+    fread(dd, sizeof(d), 5, fp);
+    fread(ee, sizeof(e), 5, fp);
+    fread(gg, sizeof(g), 5, fp);
+    fread(hh, sizeof(h), 5, fp);
+  }
+
+  printf("%c\n", a);
+  printf("%i\n", b);
+  printf("%d\n", c);
+  printf("%ld\n", d);
+  printf("%lld\n", e);
+  printf("%f\n", g);
+  printf("%lf\n", h);
+
+  printf("%s\n", aa);
+  for (int i = 0; i < 4; i++) {
+    printf("%i ", bb[i]);
+  }
+	printf("%i\n", bb[4]);
+  for (int i = 0; i < 4; i++) {
+    printf("%i ", cc[i]);
+  }
+	printf("%i\n", cc[4]);
+  for (int i = 0; i < 4; i++) {
+    printf("%li ", dd[i]);
+  }
+	printf("%li\n", dd[4]);
+  for (int i = 0; i < 4; i++) {
+    printf("%lli ", ee[i]);
+  }
+	printf("%lli\n", ee[4]);
+  for (int i = 0; i < 4; i++) {
+    printf("%f ", gg[i]);
+  }
+	printf("%f\n", gg[4]);
+  for (int i = 0; i < 4; i++) {
+    printf("%lf ", hh[i]);
+  }
+	printf("%lf\n", hh[4]);
+
+  fclose(fp);
+	return 0;
+}

semester2/pset3/3-readFile.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <strings.h>
+#include <string.h>
+
+int main(void) {
+  FILE *fp = fopen("dict.dic", "r");
+
+  int a;
+  char b[16]; // bool
+  double c;
+  char d[4096];
+
+  int n;
+  scanf("%d", &n);
+
+  for (int i = 0; i < n; i++) {
+    fscanf(fp, "%i%s%lf%s", &a, b, &c, d);
+  }
+
+  printf("%i\n", a);
+	printf("%s\n", b);
+  printf("%lf\n", c);
+  printf("%s\n", d);
+
+  return 0;
+}