11 6 [错误]'i'的名称查找已更改为ISO'for'scoping [-fpermissive] [英] 11 6 [Error] name lookup of 'i' changed for ISO 'for' scoping [-fpermissive]

问题描述

#include<iostream>
#include<conio.h>

int a[9][9], b[9][9];

int inputvalue(int x, int y, int value)
{
    for (int i = 0; i < 9; i++) {
        if (value == b[x][i] || value == b[i][y])
            return 0;
    }
    for (i = (x / 3) * 3; i <= ((x / 3) * 3) + 2; i++)
        for (int j = (y / 3) * 3; j <= ((y / 3) * 3) + 2; j++)
            if (b[i][j] == value)
                return 0;
    return value;
}

推荐答案

i 将不会存活第一个for循环。

i won't survive the first for loop. You should declare it before You do anything or declare it again in the second loop.

要理解它，使用google与c，variable，scope关键字

To understand it, use google with "c", "variable", "scope" keywords

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