printf基本用法

 #include
void main()
{
 char *m1="Binary";
 char *m2="Decimal";
 char *m3="Octal";
 char *m4="Hexadecimal";
 float dl=10000.123;
 int n=1,f=1;
 puts("Outputting a number with different field widths./n" );
 printf("%5f/n",dl);
 printf("%10f/n",dl);
    printf("%15f/n",dl);
    printf("%20f/n",dl);
    printf("%25f/n",dl);
    puts("/n Press Enter to continue...");
 fflush(stdin);
 getchar();
 puts("/nUser the * field width specifier to obtain field width");
    puts("from a variable in the argumeng list./n");
 for(n=5;n<=25;n+=5)
 {
  printf("%*f/n",n,dl);
 }
 puts("/n Press Rnter to continue...");
 fflush(stdin);
 getchar();
 puts("/n Include leading zeros./n");
    printf("%05f/n",dl);
 printf("%010f/n",dl);
    printf("%015f/n",dl);
    printf("%020f/n",dl);
    printf("%025f/n",dl);
    puts("/n Press Enter to continue...");
 fflush(stdin);
 getchar();
 puts("/nDisplay in octal,decimal,and hexadecimal.");
    puts("Use # to precede octal and hex output with 0 and0X.");
    puts("Use - to left-justify each value in its field.");
    puts("First display column labels./n");
    printf("%-15s%-15s%-15s",m2,m3,m4);
    for(n=1;n<20;n++)
 {
  printf("/n%-15d%-#15o%-#15X",n,n,n);
 }
 puts("/n Press Enter to continue...");
 fflush(stdin);
 getchar();
 puts("/n/nUse the %n conversion command to count characters./n");
 printf("%s%s%s%s%n",m1,m2,m3,m4,&n);
 printf("/n/nThe last printf() output %d characters./n",n);
 
 
}