問題

Given nums = [2, 7, 11, 15], target = 9,

Because nums[0] + nums[1] = 2 + 7 = 9,
return [0, 1].

C語言解答

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