printf 의 용법

#include <stdio.h>
int main() {
    printf("  
");
    printf("\" \\ %% 
");//" \%
    printf("abc\rxy
");//xyc
    printf("%f %g
", 1.2f, 1.2f);//1.20000 1.2
    printf("%lf %lg
", 1.2, 1.2);//1.20000 1.2
    printf("%c
", 'a');//a
    printf("%3d
", 7);  //       
    printf("%03d
", 7); //    0
    printf("%-3d  
", 7);  //-     
    printf("%7.2f
", 1.2f);  //7     7   ，.2           
    printf("%lf
", 4);   //          
    return 0;
}