c语言查找某个元素在数组中位置

[jeffsui]

#include <stdio.h>
int search(int key,int a[],int length);
int main(void){
	int loc;
    int a[]={2,4,6,7,9,11,13,23,14,32};
    //printf("%d\n", sizeof(a));
    //printf("%d\n", sizeof(a[0]));
    int x;
    printf("请输入一个数字：");
    scanf("%d", &x);
    loc = search(x, a, sizeof(a)/sizeof(a[0]));
    if (loc != -1)
    {
        printf("%d在索引为%d的位置上\n", x, loc);
    }else{
        printf("%d不存在\n",x);
    }
	return 0;
} 

int search(int key,int a[],int length){
	int ret = -1;
	int i;
	for(int i=0;i<length;i++){
		if(a[i] == key){
			ret = i;
			break;
		}
	}
	return ret;
}