银行家算法用c语言实现

银行家算法是一种避免死锁的算法，它可以确保系统不会进入死锁状态。下面是用 C 语言实现银行家算法的示例代码：

#include<stdio.h>

int main() {
    int n, m, i, j, k;
    int alloc[10][10], max[10][10], avail[10];
    int f[10], ans[10], index = 0;
    printf("Enter the number of processes: ");
    scanf("%d", &n);
    printf("Enter the number of resources: ");
    scanf("%d", &m);
    for (i = 0; i < n; i++) {
        f[i] = 0;
        printf("Enter the allocation matrix for process %d: ", i+1);
        for (j = 0; j < m; j++)
            scanf("%d", &alloc[i][j]);
        printf("Enter the maximum matrix for process %d: ", i+1);
        for (j = 0; j < m; j++)
            scanf("%d", &max[i][j]);
    }
    printf("Enter the available resources: ");
    for (i = 0; i < m; i++)
        scanf("%d", &avail[i]);
    for (k = 0; k < n; k++) {
        for (i = 0; i < n; i++) {
            if (f[i] == 0) {
                int flag = 0;
                for (j = 0; j < m; j++) {
                    if (max[i][j] - alloc[i][j] > avail[j]) {
                        flag = 1;
                        break;
                    }
                }
                if (flag == 0) {
                    ans[index++] = i;
                    for (y = 0; y < m; y++)
                        avail[y] += alloc[i][y];
                    f[i] = 1;
                }
            }
        }
    }
    printf("The safe sequence is: ");
    for (i = 0; i < n-1; i++)
        printf("P%d -> ", ans[i]);
    printf("P%d\n", ans[n-1]);
    return 0;
}

该代码通过输入进程数、资源数、分配矩阵、最大需求矩阵和可用资源量，计算出是否存在安全序列，并输出安全序列。