View difference between Paste ID: umhimP0V and DtCA4HKT

-#include <stdio.h>
+/* In order to compile this on my linux system
-#include <math.h>
+ * even though the instructions were given like this
-#include <string.h>
+ * $ gcc sine_print.c -o sine_print
-
+ * I had to add -lm or it will return exception
-int main()
+ * sine_print.c:(.text+0x8c): undefined reference to `sin'
-{
+ * collect2: ld returned 1 exit status
-    int i;
+ * for some reason it wouldn't link the math.h at the compile step
-    int offset;
+ * So I typed $ gcc sine_print.c -lm -o sine_print
-    char sinstr[80];
+ * latter I saw a post with a similar problem and they typed
-
+ * $ gcc -Wall foo.c -o foo -lm
-    memset(sinstr,0x20, 80);
+ * I'm not sure if the syntax is a convention but the first way
-    sinstr[79] = '\0';
+ * worked for me. -Wall I have seen when compiling stuff in Linux but need to
-
+ * look at the manpage still so check out those flags before you type it
-    for (i = 0; i < 20; i++) {
+
-        offset = 39 + (int)(39 * sin(M_PI * (float) i/10)):
+ * Also another weird thing is when I typed
-
+ * gcc sine_print.c -o sine_print.c
-        sinstr[offset] = '*';
+ * the file disappeared completely from my computer
-        printf("%s\n", sinstr);
+ * is this a bug or normal behavior? IDK
-        sinstr[offset] = ' ';
+
-    }
+ * prints a sideways sine wave in ASCII chars
 */
 
 #include <stdio.h>
 #include <math.h>
 #include <string.h>
 
 int main()
 {
     int i;
     int offset;
     char sinstr[80];
 
     memset(sinstr,0x20, 80);
     sinstr[79] = '\0';
 
     for (i = 0; i < 20; i++) {
         offset = 39 + (int)(39 * sin(M_PI * (float) i/10)):
 
         sinstr[offset] = '*';
         printf("%s\n", sinstr);
         sinstr[offset] = ' ';
     }
 }