该段程序是字符串冒泡排序，请大神找bug,做了好久了

#include
#include
using namespace std;
int c;

cin >> c;
char b[100][100];
for (int m = 0; m<c; m++){
    cin >> b[m];
}
int n;
    for (int j = 0; j < c; j++){
        for (int m = 0; m<c ; m++){
            if (strlen(b[j])>strlen(b[m]))
                n = strlen(b[j]);
            else
                n = strlen(b[m]);
            for (int d = 0; d <n; d++){
                if ((b[m][d] == '\0'&&b[j][d] != '\0') || (int(b[m][d])<int(b[j][d])))
                {
                    char w[20];
                    for (unsigned int a = 0; a < strlen(b[j]); a++)
                    {
                        w[a] = b[j][a];
                    }
                    w[strlen(b[j]) ]= '\0';
                    for (unsigned int a = 0; a< strlen(b[m]); a++)
                    {
                        b[j][a] = b[m][a];
                    }
                    b[j][strlen(b[m])] = '\0';
                    for (unsigned int a = 0; a < strlen(w); a++)
                    {
                        b[m][a] = w[a];
                    }
                    b[m][strlen(w)] = '\0';
                    break;
                }
            }

        }
    }


for (int m = 0; m<c; m++){
    cout << b[m] << " ";
}
    return 0;

}

你的输入只输入了二维数组的第一行吧。用二维数组干什么。

#include
using namespace std;

int main()
{
int c;
cin >> c;
char b[100][100];
for (int m = 0; m cin >> b[m];
}
int n;
for (int j = 0; j < c-1; j++){
for (int m = j+1; m if (strlen(b[j])>strlen(b[m]))
n = strlen(b[j]);
else
n = strlen(b[m]);
for (int d = 0; d <n; d++){
if (b[m][d]<b[j][d])
{
char tmp[100];
strcpy(tmp,b[m]);
strcpy(b[m],b[j]);
strcpy(b[j],tmp);
break;
}
}

        }
    }


for (int m = 0; m<c; m++){
    cout << b[m] << " ";
}
getchar();
getchar();
    return 0;

}

if (strlen(b[j])<strlen(b[m]))
                n = strlen(b[j]);
            else
                n = strlen(b[m]);