added weekly exercises of isp-ws25

c/isp-ws25/weeklies/week01/w01ex01.c

@@ -0,0 +1,13 @@
+/*
+Exercise 01:
+Get familiar with coding.
+Create a program that displays "Hello World!"
+*/
+
+#include <stdio.h>
+
+int main()
+{
+    printf("Hello World!");
+    return 0;
+}

c/isp-ws25/weeklies/week01/w01ex02.c

@@ -0,0 +1,21 @@
+/*
+Exercise 02:
+Implemente a temperature converter.
+It should convert Fahrenheit to Celsius.
+The conversion may be done with this formula: C=(F-32)*5/9
+*/
+
+#include <stdio.h>
+
+float temp_f = 0;
+float temp_c = 0;
+
+int main()
+{
+    printf("Fahrenheit: ");
+    scanf("%f", &temp_f);
+    temp_c = (temp_f - 32)*5/9;
+    printf("Celsius: %.2f\n", temp_c);
+    
+    return 0;
+}

c/isp-ws25/weeklies/week01/w01ex03.c

@@ -0,0 +1,20 @@
+/*
+Exercise 03:
+Implement a ASCII-to-number converter.
+It should ask for a character, display it as a number, then the original character again.
+Insert enough spaces so that the character and number align.
+*/
+
+#include <stdio.h>
+
+unsigned char input_char = 0;
+
+int main()
+{
+    printf("%-17s", "Insert character: ");
+    scanf("%c", &input_char);
+    printf("%-17s %d\n", "Number: ", input_char);
+    printf("%-17s %c\n", "ASCII Character: ", input_char);
+    
+    return 0;
+}