力扣------两数之和

/**
 * Note: The returned array must be malloced, assume caller calls free().
 */
int* twoSum(int* nums, int numsSize, int target, int* returnSize){
    int* ans=(int*)calloc(2,sizeof(int));
    *returnSize=0;
    int flag=0;
    for(int a=0;a<numsSize-1;a++){
        for(int b=a+1;b<numsSize;b++){
            if(nums[a]+nums[b]==target){
                ans[*returnSize]=a;
                *returnSize=*returnSize+1;
                ans[*returnSize]=b;
                *returnSize=*returnSize+1;
                flag=1;
                break;
            }
        }
        if(flag==1){
            break;
        }
    }
    return ans;
}
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