求助，错误显示 表达式必须包含指向对象的指针类型，但它具有类型 "int"

P1047 [NOIP2005 普及组] 校门外的树

Aijibaisuilaoren @ 2023-02-26 00:20:11

#include<stdio.h>
int main() {
    int i, j, a, b;
    int a[100][1000] = 0;
    int count = 0;
    int x, y;
    scanf("%d%d", &i, &j);
    for (x = 0; x < i; x++) {
        for (int y = 0; y <= j; y++) {
            a[x][y] = 1;
        }
    }
    for (x = 0; x < i; x++) {
        scanf("%d%d", &a, &b);
        for (int y = a; y <= b; x++) {
            a[x][y] = 0;
        }
    }
    for (x = 0; x < i;) {
        for (int y = 0; y <= j; y++)
            count = count + a[y][x];
    }
    printf("%d", count);
    return 0;
}

by cn_ryh @ 2023-02-26 07:28:39

@Aijibaisuilaoren 你先定义的变量 a 和数组 a[] 重名了

by Aijibaisuilaoren @ 2023-03-03 10:45:17

@ryh2007316 草率了

by liuzekai123 @ 2023-03-03 23:28:15


using namespace std;
int s[100005];
int main()
{
    int L,M,cnt=0,a,b;
    cin>>L>>M;
    for(int i=1;i<=M;i++)
    {
        cin>>a>>b;
        for(int j=a;j<=b;j++) s[j]=1;
    }
    for(int i=0;i<=L;i++)
    {
            if(s[i]==0)
        {
            cnt++;
        }
    }

    cout<<cnt;
    return 0;
}**对一下**
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