add cviko 3

Cviko3_1/Makefile

@@ -0,0 +1,10 @@
+all: main
+
+CC = gcc
+override CFLAGS += -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-unused-result -Wno-unknown-pragmas -pedantic -lm
+
+main: main.c
+	$(CC) $(CFLAGS) -O1 ./*.c -o "$@"
+
+clean:
+	rm -f main main-*

Cviko3_1/main.c

@@ -0,0 +1,145 @@
+#include "types.h"
+#include <stdio.h>
+
+void read_print_string() {
+  // TODO: 1. Read a string from stdin of max-length of 100 characters.
+  printf("Enter a string (100 chars max):\n");
+  char input[101];
+  scanf("%100[^\n]", input);
+
+  // TODO: 2. Print read string to stdout.
+  printf("%s\n", input);
+  return;
+}
+
+void read_print_string_length() {
+  // TODO: 1. Read a string from stdin of max-length of 100 characters.
+  printf("Enter a string (100 chars max):\n");
+  char input[101];
+  scanf(" %100[^\n]", input);
+
+  // TODO: 2. Print the length of the read string to stdout. (do not count
+  // '\0').
+  for (int i = 0; i < 101; ++i) {
+    if (input[i] == '\0') {
+      printf("Length of your string is %d", i);
+      break;
+    }
+  }
+  return;
+}
+
+void read_print_string_alphnum() {
+  // TODO: 1. Read a string from stdin of max-length of 100 characters.
+  printf("Enter a string (100 chars max):\n");
+  char input[101];
+  scanf(" %100[^\n]", input);
+
+  // TODO: 2. Print both the number of letters (a-z, A-Z) and the number of
+  // numerals (0-9) in the read string to stdout.
+  int letters = 0;
+  int numbers = 0;
+  for (int i = 0; i < 101; ++i) {
+    if (input[i] == '\0') {
+      break;
+    }
+    if ((input[i] >= 'a' && input[i] <= 'z') ||
+        (input[i] >= 'A' && input[i] <= 'Z')) {
+      letters++;
+    } else if (input[i] >= '0' && input[i] <= '9') {
+      numbers++;
+    }
+  }
+  printf("Your string contains %d letters and %d numbers", letters, numbers);
+  return;
+}
+
+void read_print_string_lower() {
+  // TODO: 1. Read a string from stdin of max-length of 100 characters.
+  printf("Enter a string (100 chars max):\n");
+  char input[101];
+  scanf(" %100[^\n]", input);
+
+  // TODO: 2. Print the read string with all letters in lowercase (e.g., A => a)
+  // to stdout.
+  for (int i = 0; i < 101; ++i) {
+    if ((input[i] >= 'A' && input[i] <= 'Z')) {
+      input[i] += 32;
+    }
+  }
+  printf("%s\n", input);
+  return;
+}
+
+void read_print_string_replace() {
+  // TODO: 1. Read a character and a string of max-length of 100 characters from
+  // stdin.
+  printf("Enter a single character:\n");
+  char c;
+  scanf(" %c", &c);
+
+  printf("Enter a string (100 chars max):\n");
+  char input[101];
+  scanf(" %100[^\n]", input);
+
+  // TODO: 2. Print the read string with all occurences of read string replaced
+  // with '_' (e.g., ('a', "abba") => _bb_) to stdout.
+  for (int i = 0; i < 101; ++i) {
+    if (input[i] == '\0') {
+      break;
+    }
+    if (input[i] == c) {
+      input[i] = '_';
+    }
+  }
+  printf("%s\n", input);
+  return;
+}
+
+void read_print_string_compare() {
+  // TODO: 1. Read  2 string, each of max-length of 100 characters, from stdin.
+  printf("Enter a string (100 chars max):\n");
+  char inputA[101];
+  scanf(" %100[^\n]", inputA);
+
+  printf("Enter another string (100 chars max):\n");
+  char inputB[101];
+  scanf(" %100[^\n]", inputB);
+
+  // TODO: 2. Determine whether strings are equal (two strings are equal if they
+  // have the same length and characters in both strings on a given index are
+  // identical).
+  int is = 1;
+  for (int i = 0; i < 101; ++i) {
+    if (inputA[i] == '\0' && inputB[i] == '\0') {
+      break;
+    }
+    if (inputA[i] != inputB[i] || (inputA[i] == '\0') || (inputB[i] == '\0')) {
+      is = 0;
+      break;
+    }
+  }
+  printf("%s", (is == 1) ? "The two strings ARE equal"
+                         : "The two strings are NOT equal");
+  return;
+}
+
+#ifndef TEST_BUILD
+
+int main(int argc, char *argv[]) {
+  printf("-- read_print_string --\n");
+  read_print_string();
+  printf("\n-- read_print_string_length --\n");
+  read_print_string_length();
+  printf("\n-- read_print_string_alphnum --\n");
+  read_print_string_alphnum();
+  printf("\n-- read_print_string_lower --\n");
+  read_print_string_lower();
+  printf("\n-- read_print_string_replace --\n");
+  read_print_string_replace();
+  printf("\n-- read_print_string_compare --\n");
+  read_print_string_compare();
+  return 0;
+}
+
+#endif

Cviko3_1/types.h

@@ -0,0 +1,18 @@
+/**
+ * Hlavičkový soubor types.h
+ *
+ *     OBSAH V TOMTO SOUBROU NEUPRAVUJTE!
+ */
+
+#ifndef TYPES_H
+#define TYPES_H
+
+// DEKLAROVANÉ HLAVIČKY FUNKCÍ NIJAK NEMĚŇTE
+void read_print_string();
+void read_print_string_length();
+void read_print_string_alphnum();
+void read_print_string_lower();
+void read_print_string_replace();
+void read_print_string_compare();
+
+#endif

Cviko3_2/Makefile

@@ -0,0 +1,27 @@
+all: main
+
+CC = gcc
+override CFLAGS += -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-unused-result -Wno-unknown-pragmas -pedantic -lm
+
+.PHONY: run test submit clean
+
+main: main.c
+	$(CC) $(CFLAGS) -O1 ./*.c -o "$@"
+
+main-debug: main.c
+	$(CC) $(CFLAGS) -O1 -g ./*.c -o "$@"
+
+main-test: main.c
+	$(CC) $(CFLAGS) -DTEST_BUILD=1 ./*.c -o "$@"
+
+main-solution: main.c
+	$(CC) $(CFLAGS) -DTEST_BUILD=1 -DSOLUTION_BUILD=1 test.c solution/*.c -o "$@"
+
+test:
+	@./.tests/scripts/run_tests.sh
+
+submit:
+	@PROJECT_SUBMIT_MODE=sources ECHO_QUIET=1 ./.tests/scripts/run_tests.sh
+
+clean:
+	rm -f main main-*

Cviko3_2/main.c

@@ -0,0 +1,114 @@
+#include "types.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/**
+ * Safely print first argument provided to the program. Determine its meaning.
+ *
+ * @param argc total number of arguments provided to the program
+ *
+ * @param argv array/vector of arguments
+ */
+void print_first_argument(int argc, char *argv[]) {
+  if (argc < 1) {
+    return;
+  }
+  printf("%s\n", argv[0]);
+  return;
+}
+
+/**
+ * Safely print first 4 arguments provided to the program while converting them
+ * to their corresponding data type.
+ *
+ * ./main <int> <double> <string>
+ *
+ * To convert <string> to <int>, use function atoi()
+ * (https://cplusplus.com/reference/cstdlib/atoi/)
+ *
+ * To convert <string> to <double>, use function atof()
+ * (https://cplusplus.com/reference/cstdlib/atof/)
+ *
+ * Use the following commmand to execute your program with set of arguments:
+ *
+ *      ./main 42 13.37 hello_program
+ *
+ * @param argc total number of arguments provided to the program
+ *
+ * @param argv array/vector of arguments
+ */
+void print_parse_arguments(int argc, char *argv[]) {
+  int a;
+  double b;
+  int s = (argc<4)?argc:4;
+
+  for (int i = 0; i < s; ++i) {
+    switch (i) {
+    case 1:
+      a = atoi(argv[i]);
+      printf("%d\n",a);
+      break;
+    case 2:
+      b = atof(argv[i]);
+      printf("%.3f\n",b);
+      break;
+    default:
+    printf("%s\n",argv[i]);
+      break;
+    }
+  }
+  return;
+}
+
+/**
+ * Safely print ALL arguments provided to the program without any conversion.
+ *
+ * ./main <int> <double> <string>
+ *
+ * @param argc total number of arguments provided to the program
+ *
+ * @param argv array/vector of arguments
+ */
+void print_all_arguments(int argc, char *argv[]) {
+  for (int i = 0; i < argc; ++i) {
+    printf("%s\n", argv[i]);
+  }
+  return;
+}
+
+/**
+ * Safely print the largest argument
+ *
+ * ./main <int> <double> <string>
+ *
+ * @param argc total number of arguments provided to the program
+ *
+ * @param argv array/vector of arguments
+ */
+void print_largest_argument(int argc, char *argv[]) {
+  char *c = "";
+  for (int i = 0; i < argc; ++i) {
+    if(strlen(argv[i]) > strlen(c)){
+      c = argv[i];
+    }
+  }
+  printf("Largest argument: %s",c);
+  return;
+}
+
+#ifndef TEST_BUILD
+
+int main(int argc, char *argv[]) {
+  printf("\n-- print_first_argument --\n");
+  print_first_argument(argc, argv);
+  printf("\n-- print_parse_arguments --\n");
+  print_parse_arguments(argc, argv);
+  printf("\n-- print_all_arguments --\n");
+  print_all_arguments(argc, argv);
+  printf("\n-- print_largest_argument --\n");
+  print_largest_argument(argc, argv);
+  return 0;
+}
+
+#endif

Cviko3_2/types.h

@@ -0,0 +1,14 @@
+/**
+ * Hlavičkový soubor types.h
+ *
+ *     OBSAH V TOMTO SOUBROU NEUPRAVUJTE!
+ */
+
+#ifndef TYPES_H
+#define TYPES_H
+
+// DEKLAROVANÉ HLAVIČKY FUNKCÍ NIJAK NEMĚŇTE
+void print_first_argument(int argc, char *argv[]);
+void print_parse_arguments(int argc, char *argv[]);
+void print_all_arguments(int argc, char *argv[]);
+#endif