문제1 코드:

#include <stdio.h>


int plus(int n){
	if (n == 0){
		return 0;
	}
	else if (n == 1){
		return 1;
	}
	else {
		return n + plus(n - 1);
	}
}

void main(){


	int i, j=0;


	printf("                                 ::     :. : \n"
		"                                 *==     +++    =**\n"
		"                      ::    =:    :..    +++   :*.      :==\n"
		"                     *:*          **+    ++*   * +     ***\n"
		"                      .+*                            **       *:*\n"
		"               *=+=     :=                                 .+ +:\n"
		"                 +=**                                      :++           .    . ...\n"
		"         .===:    . .                                                 #=============#+\n"
		"         ..:+===:                                                     *             *=\n"
		"              . .                                                     *      .     .*=\n"
		"                                                                      *    :##**   .*=\n"
		"                                                ..++            .*+.  *   ##****    *=\n"
		"     .                     :++*++.            =######          +#*#:  #  ****#. ...:#+\n"
		"     :==++==           =####*****##.        ##*#*****         ##**=    ##****.:::::...\n"
		"          ..         =*#******###*=       +***#:.***+  .****::***#   :+#*****      +\n"
		"                   +*#***##*+=:..        +#*#=. ****+*#%*=. .#*** .+*##:#****:+**##.\n"
		"   :*#*#*==:      *#*****..            =*#**. .*****##*:    *****+###*. :#***###:\n"
		"                  #*****         .:.   #*****##****#*.      =#####**.    .****\n"
		"         ...      *****+   ....=**.. :******#******=         .:+:.\n"
		"    ====+:..      #*******###%*=  .:##**##++.  +**.\n"
		"                  ++#######+=. :*%##***#+.     +**\n"
		"        .++=+:                 ...#***#.       ***\n"
		"      =+=  .                      +*#*:        :##\n"
		"             .*+                                =                 :+:+.\n"
		"         ...+= :                                                   .===**\n"
		"         ++      .=.                                           :+.\n"
		"              ..+*=+                                       ..    +=:.\n"
		"             =**+     :+                                   #:+      +\n"
		"                     ++=    .                         :+    =*==\n"
		"                   +**:    ++    ++=                   .      ++\n"
		"                          ::     +     =+=     :::      **\n"
		"                          =            ++       .        :\n"
		"                                =      *+\n");




	printf("Team Name : 진짜김정빈\n");
	printf("Team Member : 김정빈, 류재상\n");
	printf("########################################\n");

	
	for (i = 1; i <= 100; i++){
		j = j + i;
	}



	printf("1~100의 합 = %d\n", j);


	printf("1~100의 합 = %d\n", plus(100));



	printf("N : ");
	scanf("%d", &j);
	printf("1~%d의 합 = %d", j, plus(j));


	


}