[Code] multiplication table / 구구단

이번 과제는 원하는 만큼 구구단 출력하기!!!!

아래 그림과 같다.

급하게 만들어서 약간의 오류가 있다. 알아서 수정하길 바란다.

// This source was written by Yo-han Kim (johnkim126@korea.ac.kr)
// Title : Print a multiplication Table with command line argument (Programming Assignment on Operating System, Korea Univ.)

#include  <stdio.h>
#include  <stdlib.h>
#include  <math.h>
#include  <string.h>

int main(int argc, char** argv){

	/*	- variables definition and initialization -
	int i : print row
	int j : print column
	int k : input argument
	int line : change line
	int count : printf until 5 rows */

	int i=1,j=1,k=0;  
	int line=1,count=1;
	k = atoi(argv[1]); //using function that change ascii code to integer

	/*	using three for loop 	*/

	for(line=1;line<=k;line=line+5){ //1st for loop (change line)
		
		for(j=1;j<=k;j++){ //2nd for loop(print column to input argument)
		
			for(i=line;i<=k;i++){  //3rd for loop (print row to input argument)
			
					if(i>=j&&count<=5){ 
						// 1st condition : check the basic rule, printf until 5 rows
						// basic rule : input - 2, print - 2*1=2, 2*2=4... 2*3<= No way
						printf(" %2d * %2d =%3d ",i,j,i*j);		
					} else if(count<=5) {
						// 2st condition : print for space and design
						printf("              ");
					}
					count++; // increasing variable
			}
				printf("\n");
				count=1; //initialization in 2nd for loop 
		}
		printf("==========================================================================\n");
	}
		
	printf("\n");	
	
	return 0;
}