[C언어_Day1]for문 연습

#include<stdio.h>
int main(void) {
    int num, i, j;
    printf("Input number : ");
    scanf("%d",&num);
    if(num%2==0) {
        printf("# 짝수가 입력 되었습니다!");
        return;
    }
    int middle = num/2;
    for (i=0;i<num;i++) {
        for (j=num-i;j>1;j--)
                printf(" ");
        for (j=0;j<1+i;j++)
                printf("*");
        printf("\n");
    }
    printf("\n");
    for (i=0;i<num;i++) {
        for (j=0;j<i;j++)
                printf(" ");
        for (j=num-i;j>0;j--)
                printf("*");
        printf("\n");
    }
    printf("\n");
    for (i = 1; i < middle+1; i++) {
        for (j = 0; j < num - i-middle; j++) {
            printf(" ");
        }
        for (j = 0; j < 2 * i - 1; j++) {
            printf("*");
        }
        printf("\n");
    }
    for (i = middle+1; i > 0; i--) {
        for (j = 0; j < num - i-middle; j++) {
            printf(" ");
        }
        for (j = 0; j < 2 * i - 1; j++) {
            printf("*");
        }
        printf("\n");
    }
    system( "pause");
    return 0;
}