Question

我刚刚开始使用C语言，因为我的大学有一些编程课程。当我们在Dev C ++程序中编程时，我从高中知道一点C。现在我们需要使用Visual Studio，我编写的下一个程序在Dev C ++中工作正常，但在输入名称后崩溃了。在开发C ++中，我从_s和strcat中删除了scanf，它完美无缺。有人可以帮我解决这个问题吗？这个程序是关于输入一个名字，它应该随机设置你在这两个团队中的一个。

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

int main() {
    int maxPlayers = 16, player, teamForming, numPlayer1 = 0, numPlayer2 = 0;
    char blueTeam[256] = "", redTeam[256] = "", name[16];
    for (player = 1; player <= maxPlayers; player++) {
        printf("\nEnter a name of %d. player : ", player);
        scanf_s(" %s", name);
        teamForming = rand() % 2;
        if (teamForming == 0) {
            if (numPlayer1 == 8) {
                strcat_s(redTeam, name);
                strcat_s(redTeam, " ");
                numPlayer2++;
                break;
            }
            strcat_s(blueTeam, name);
            strcat_s(blueTeam, " ");
            numPlayer1++;
        } else {
            if (numPlayer2 == 8) {
                strcat_s(blueTeam, name);
                strcat_s(blueTeam, " ");
                numPlayer1++;
                break;
            }
            strcat_s(redTeam, name);
            strcat_s(redTeam, " ");
            numPlayer2++;
        }
    }
    printf("\nBlue team : %s.\n", blueTeam);
    printf("\nRed team : %s.\n", redTeam);
    return 0;
}

Answer 1

scanf_s和scanf的语义略有不同：对于s和[格式，您必须传递目标数组的大小：

scanf_s(" %s", name, sizeof(name));

类似地，strcat_s作为目标数组和源字符串之间的第三个参数，即目标数组中元素的数量。

以下是您的代码的修改版本：

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

int main(void) {
    int maxPlayers = 16, player, teamForming, numPlayer1 = 0, numPlayer2 = 0;
    char blueTeam[256] = "", redTeam[256] = "", name[16];
    for (player = 1; player <= maxPlayers; player++) {
        printf("\nEnter a name of %d. player : ", player);
        scanf_s(" %s", name, sizeof(name));
        teamForming = rand() % 2;
        if (teamForming == 0) {
            if (numPlayer1 == 8) {
                strcat_s(redTeam, sizeof(redTeam), name);
                strcat_s(redTeam, sizeof(redTeam), " ");
                numPlayer2++;
                break;
            }
            strcat_s(blueTeam, sizeof(blueTeam), name);
            strcat_s(blueTeam, sizeof(blueTeam), " ");
            numPlayer1++;
        } else {
            if (numPlayer2 == 8) {
                strcat_s(blueTeam, sizeof(blueTeam), name);
                strcat_s(blueTeam, sizeof(blueTeam), " ");
                numPlayer1++;
                break;
            }
            strcat_s(redTeam, sizeof(redTeam), name);
            strcat_s(redTeam, sizeof(redTeam), " ");
            numPlayer2++;
        }
    }
    printf("\nBlue team : %s.\n", blueTeam);
    printf("\nRed team : %s.\n", redTeam);
    return 0;
}

由于Visual Studio Ultimate 2013中的scanf_s，程序崩溃了

1 个答案: