c - C 中的段错误在 main 中比较从结构到数组的整数成员

Question

我在下面的行中遇到段错误。

if((rel[i].node1 == SI && rel[i].node2 == gates[j]) || (rel[i].node2 == SI && rel[i].node1 == gates[j])

现在，所有变量/成员都是整数并且它们都已初始化。我真的不知道该怎么办。我也尝试过更改索引。

希望能得到一些帮助，谢谢。

代码:

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/
struct relationship {
   int node1;
   int node2;
};

int main()
{

    int N; // the total number of nodes in the level, including the gateways
    int L; // the number of links
    int E; // the number of exit gateways
    scanf("%d%d%d", &N, &L, &E);

    int gates[E];
    struct relationship rel[L];

    for (int i = 0; i < L; i++) {
        int N1; // N1 and N2 defines a link between these nodes
        int N2;
        scanf("%d%d", &N1, &N2);
        rel[i].node1 = N1;
        rel[i].node2 = N2;
    }

    for (int i = 0; i < E; i++) {
        int EI; // the index of a gateway node
        scanf("%d", &EI);
        gates[i] = EI;
    }

    while (1) {
        int SI; // The index of the node on which the Skynet agent is positioned this turn
        scanf("%d", &SI);

        int i, j;
        for(i=0; i < L; i++){

            //for(j=0; j <E; j++){

                if((rel[i].node1 == SI && rel[i].node2 == gates[j]) || (rel[i].node2 == SI && rel[i].node1 == gates[j])) {
                    printf("%d %d ood\n", rel[i].node1, rel[i].node2);
                    rel[i].node1 = -1;
                    rel[i].node2 = -1;

                }
           // }
            /*if(SI == rel[i].node1 || SI ==rel[i].node2){
                printf("%d %d %d \n", rel[i].node1, rel[i].node2, SI);
               //printf("%d %d\n", rel[i].node1, rel[i].node2);
               rel[i].node1 = -1;
               rel[i].node2 = -1;
               break;
            }*/
        }
    }

    return 0;
}

Answer 1

您没有初始化 j，因此 gates[j] 最终出现段错误。