added string input with scanf()

src/stdio/scanf/scan.c

@@ -273,7 +273,43 @@ int __scanf(
 					// read a serie of non whitespace char from the current input stream
 					// and store in the corresponding arg as a char by reference
 
-					/* TODO: */
+					char *c = (char *) va_arg( *args, char* );
+					char temp;
+
+					if (in->readmaxlength==-1)				// read the maximum number of non-whitespace characters
+					{
+						for(;;)
+						{
+							temp = __scanf_peek( in );
+							if (!isspace(temp) && temp != EOF)
+							{
+								*c = __scanf_in( in );
+								in->readsofar++;
+								c++;
+							}
+							else break;
+						}
+						*c = '\0';							// add the mandatory terminal '\0'
+					}
+					else
+					{
+						for(int u = 0; u < in->readmaxlength; u++ )
+						{
+							temp = __scanf_peek( in );
+							if (!isspace(temp) && temp != EOF)
+							{
+								*c = __scanf_in( in );
+								in->readsofar++;
+								c++;
+							}
+							else break;
+						}
+						*c = '\0';	
+					}
+					in->readmaxlength=-1;
+					ret++;
+
+					break;
 				}
 
 			}