C语言基础练习9

1.若外部变量与局部变量同名，分析结果

#include<stdio.h>

int a = 3, b = 5;
int main()
{
	int max(int a, int b);
	int a = 8;
	printf("max=%d\n", max(a, b));
    return 0;
}

int max(int a, int b)
{
	int c;
	c = a > b ? a : b;
	return(c);
}

运行结果：

2.调用函数，求3个整数中的大者

#include<stdio.h>


int main()
{
	int max();
	extern int A, B, C;
	printf("Please enter three integer numbers:");
	scanf_s("%d %d %d", &A, &B, &C);
	printf("max is %d\n", max());
    return 0;
}

int A, B, C;

int max()
{
	int m;
	m = A > B ? A : B;
	if (C > m) m = C;
	return(m);
}

运行结果：