//昇順になっているか否かを確認
void main(){
	int x[5]; // 箱が5個できる. x[0], x[1], x[2], x[3], x[4]
	x[0] = 6;
	x[1] = 43;
	x[2] = 12;
	x[3] = 78;
	x[4] = 8;

	if( x[0]<=x[1]  && x[1]<=x[2] && x[2]<=x[3] && x[3]<=x[4] ){
		printf("ok\n");
	} else {
		printf("ng\n");
	}
	printf("%d %d %d %d %d\n", x[0], x[1], ...);
}
----
//昇順になっているか否かを確認
void main(){
	int x[5]; // 箱が5個できる. x[0], x[1], x[2], x[3], x[4]
	int i, cnt;
	x[0] = 6;
	x[1] = 43;
	x[2] = 12;
	x[3] = 78;
	x[4] = 8;

	cnt = 0;
	for(i=0; i<5-1; i++){
		if( x[i] <= x[i+1] ){
			cnt ++;
		}
	}
	if( cnt == 4 ){
		printf("ok\n");
	} else {
		printf("ng\n");
	}
	printf("%d %d %d %d %d\n", x[0], x[1], ...);
}
----
int x=5, y=7, a, b, c, d, e, f, g;
// xとy を交換  !!! 
a = x;
x = y;
y = a;
printf("%d %d", x, y);
----
//昇順に変更
void main(){
	int x[5]; // 箱が5個できる. x[0], x[1], x[2], x[3], x[4]
	int i, cnt;
	x[0] = 6; ... x[4] = 8;

	do{
		if( x[0] > x[1] ){
			a = x[0];
			x[0] = x[1];
			x[1] = a;
		}
		if( x[1] > x[2] ){
			a = x[1];
			x[1] = x[2];
			x[2] = a;
		}
		if( x[2] > x[3] ){
			a = x[2];
			x[2] = x[3];
			x[3] = a;
		}
		if( x[3] > x[4] ){
			a = x[3];
			x[3] = x[4];
			x[4] = a;
		}

		cnt = 0;
		for(i=0; i<5-1; i++){
			if( x[i] <= x[i+1] ){
				cnt ++;
			}
		}
	} while( cnt < 4 );
	printf("%d %d %d %d %d\n", x[0], x[1], ...);
}
----
//昇順に変更
void main(){
	int x[5]; // 箱が5個できる. x[0], x[1], x[2], x[3], x[4]
	int i, cnt, a;
	x[0] = 6; ... x[4] = 8;

	do{
		for(i=0; i<5-1; i++){
			if( x[i] > x[i+1] ){
				a = x[i];
				x[i] = x[i+1];
				x[i+1] = a;
			}
		}

		cnt = 0;
		for(i=0; i<5-1; i++){
			if( x[i] <= x[i+1] ){
				cnt ++;
			}
		}
	} while( cnt < 4 );
	printf("%d %d %d %d %d\n", x[0], x[1], ...);
}