c语言两数之和

int *twoSum(int *nums , int numsSize , int target , int *returnSize)
{
     int i = 0 , j = 0;
     *returnSize = 2;
     int *a = (int *)malloc(sizeof(int) * 2);
     for(i = 0;i<numsSize;i++)
     {
         for(j=i+1;j<numsSize;j++)
         {
                 if(nums[i] + nums[j] == 0)
                     { 
                              a[0] = i;
                              a[1] = j;
                              return a;
                     }
       }
             
       }
       return a;
       }

#include "stdio.h"
void main()
{
    int a,b,max;
    scanf("%d %d",&a,&b);
    if(a>b);
    max=a;
    if(a<b)
    max=b;
    printf("max=%d",max);
}