afternoon-commit-06-11-2020

Author: root

variable_argu/myprintf.c

@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdarg.h>
+
+extern char *itoa(int, char *, int);
+
+void myprintf(const char *fmt, ...)
+{
+const char *p;
+va_list argp;
+int i;
+char *s;
+char fmtbuf[256];
+
+va_start(argp, fmt);
+
+for(p = fmt; *p != '\0'; p++)
+	{
+	if(*p != '%')
+		{
+		putchar(*p);
+		continue;
+		}
+
+	switch(*++p)
+		{
+		case 'c':
+			i = va_arg(argp, int);
+			putchar(i);
+			break;
+
+		case 'd':
+			i = va_arg(argp, int);
+			s = itoa(i, fmtbuf, 10);
+			fputs(s, stdout);
+			break;
+
+		case 's':
+			s = va_arg(argp, char *);
+			fputs(s, stdout);
+			break;
+
+		case 'x':
+			i = va_arg(argp, int);
+			s = itoa(i, fmtbuf, 16);
+			fputs(s, stdout);
+			break;
+
+		case '%':
+			putchar('%');
+			break;
+		}
+	}
+
+va_end(argp);
+}

variable_argu/var-arg.c

@@ -0,0 +1,7 @@
+#include<stdio.h>
+#include "myprintf.c"
+void myprintf(const char *fmt, ...);
+int main(void)
+{
+ myprintf("%s", 'S');
+}

variable_argu/var-main.c

@@ -12,17 +12,19 @@ int average(int num, ...)
     int sum = 0, i; 
 
     va_start(valist, num); 
-    for (i = 0; i < num; i++)  
+    
+    for (i = 0; i < num; i++)
+    {
         sum += va_arg(valist, int); 
-  
+    }
     va_end(valist); 
 
-    return sum / num; 
+    return sum ;
 } 
 
 int main() 
 { 
-    printf("Average of {2, 3, 4} = %d\n",  average(2, 3, 4)); 
-    printf("Average of {3, 5, 10, 15} = %d\n", average(3, 5, 10, 15)); 
+    printf("Average = %d\n",  average(2, 3, 4)); 
+    printf("Average  = %d\n", average(3, 5, 10, 15)); 
     return 0; 
-} 
+}