04일차 C 언어(16): 루프 네스트-기본 개념

/*
        :
 while()
 {
    while()
    {
 
    }
 }
 
 while()
 {
    do{
    }while();
 }
 
 do
 {
    while()
    {
    }
 }while();
 
 for (;;)
 {
    for(;;)
    {
    }
 }
 
    :              :          *         
 */

#include 
int main()
{
    
    //    :      
    //    :              :          *         
    /*
    for (int i = 0; i < 2; i++) {
        for (int j = 0; j < 3; j++) {
            printf("i = %i,j = %i
",i,j);
        }
    }
     */
    
    /*
       
    for (int j = 0; j < 3; j++) {
        printf("i = %i,j = %i
",i,j);
    }
    for (int j = 0; j < 3; j++) {
        printf("i = %i,j = %i
",i,j);
    }
     */
    
#pragma 1.      
    /*
         1
          1
          2
         2
          1
          2
         3
          1
          2
     */
    /*
    printf("    1
");
    printf("      1
");
    printf("      2
");
    printf("    2
");
    printf("      1
");
    printf("      2
");
    printf("    3
");
    printf("      1
");
    printf("      2
");
     */
    
    for (int i = 0; i < 3; i++) {
        printf("    %i
",i + 1);
        /*
        printf("      1
");
        printf("      2
");
        printf("      3
");
        printf("      4
");
        printf("      5
");
        printf("      6
");
        printf("      7
");
         */
        for (int j = 0 ; j < 20; j++) {
            printf("      %i
",j + 1);

        }
    }
    return 0;
}