printf in c

1/* printf example */
2#include <stdio.h>
3
4int main()
5{
6   printf ("Characters: %c %c \n", 'a', 65);
7   printf ("Decimals: %d %ld\n", 1977, 650000L);
8   printf ("Preceding with blanks: %10d \n", 1977);
9   printf ("Preceding with zeros: %010d \n", 1977);
10   printf ("Some different radices: %d %x %o %#x %#o \n", 100, 100, 100, 100, 100);
11   printf ("floats: %4.2f %+.0e %E \n", 3.1416, 3.1416, 3.1416);
12   printf ("Width trick: %*d \n", 5, 10);
13   printf ("%s \n", "A string");
14   return 0;
15}

1#include <stdio.h>
2
3int printf(const char *format, ...);
4
5int main(void)
6{
7  int nb = 20;
8 
9  printf("Hello World !\n");
10  printf("%d\n", nb);
11  printf("%s/%d\n", "Nice", 20);
12  return (0);
13}
14
15/// output :
16///
17///	Hello World !
18///	20
19///	Nice/20
20///