Question

输入4个整数，要求按由大到小顺序输出，用c语言怎么写呀，不是c++？

Answer 1

程序写死了参数4

void SortArry(int* a, int nCnt)

{

if (a == NULL || nCnt <= 0)

{

return;

}

for (int i = 0; i < nCnt;i++)

{

for (int j = i + 1; j < nCnt;j++)

{

if (a[i] < a[j])

{

int nTmp = a[i];

a[i] = a[j];

a[j] = nTmp;

}

}

}

}

int _tmain(int argc, _TCHAR* argv[])

{

int arrNum[4] = { 0 };

printf("pls input 4 number\n");

for (int i = 0; i < 4; i++)

{

scanf_s("%d", &arrNum[i]);

}

SortArry(arrNum, 4);

for (int i = 0; i < 4;i++)

{

printf("a[%d] = %d\n", i, arrNum[i]);

}

getchar();

}

运行结果