网上关于这一问题的写法其实很多，但是很多方法不具有实际的应用价值（比如单纯使用if和else语句写出六种可能做判别），当然这也不失为一种思路，这里仅罗列出三种具有代表性的处理方法（三目运算法、IF比较法、和IF比较的指针写法）
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//if语句依次比较大小排序
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#include
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int compare(
int x,
int y,
int z)
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{
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int t=
0;
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if(x
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{
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t=x;x=y;y=t;
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}
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if(y
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{
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t=y;y=z;z=t;
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}
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if(x
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{
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t=x;x=y;y=t;
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}
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printf(
"the number from big to small is\n %d %d %d \n",x,y,z);
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}
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int main()
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{
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int a,b,c;
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printf(
"please input three numbers \n");
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scanf(
"%d %d %d",&a,&b,&c);
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compare(a,b,c);
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return
0;
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}
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//三目运算比大小
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#include
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int max(
int x,
int y,
int z)
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{
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int max=
0;
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max=x>y?x:y;
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max=max>z?max:z;
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return max;
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}
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int smaller(
int x,
int y,
int z)
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{
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int smaller=
0;
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smaller=x
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smaller=smaller
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return smaller;
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}
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int middle(
int x,
int y,
int z)
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{
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int middle=
0;
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middle=x+y+z-smaller(x,y,z)-max(x,y,z);
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return middle;
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}
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int main()
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{
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int a,b,c;
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printf(
"please input three numbers \n");
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scanf(
"%d %d %d",&a,&b,&c);
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printf(
"the number from max to small is %d %d %d \n",max(a,b,c),middle(a,b,c),smaller(a,b,c));
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return
0;
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}
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//指针的使用与指针解引用
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#include
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int compare(
int *x,
int *y,
int *z)
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{
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int t;
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if(*x<*y)
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{
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t=*x;*x=*y;*y=t;
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}
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if(*y<*z)
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{
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t=*y;*y=*z;*z=t;
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}
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if(*x<*y)
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{
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t=*x;*x=*y;*y=t;
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}
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printf(
"the number from big to small is\n%d %d %d \n",*x,*y,*z);
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}
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-
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int main()
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{
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int a,b,c;
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printf(
"please input three numbers \n");
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scanf(
"%d %d %d",&a,&b,&c);
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compare(&a,&b,&c);
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return
0;
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}