使用C语言编写LL（1）分析法，输入一个文法，输出first和follow集，并输出预测分析表，利用栈和预测分析表来对输入串进行分析，判断输入串是否是该文法的一个合适的语法范畴。

LL(1)分析法是一种自顶向下的语法分析方法，它在处理输入时从左到右进行，同时采用最左推导的方式。下面是一个使用C语言编写LL(1)分析法的示例：

假设我们有以下文法：

S -> ABC
A -> a | ε
B -> b | ε
C -> c | ε

首先，我们需要计算出该文法的First集和Follow集，代码如下：

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

#define MAX 100

char first[MAX][MAX];
char follow[MAX][MAX];
char predict_table[MAX][MAX];
int num_rules;
char rules[MAX][MAX];
char non_terminals[MAX];
char terminals[MAX];
int num_non_terminals;
int num_terminals;
int has_epsilon[MAX];

void compute_first(int index);
void compute_follow();
int is_terminal(char c);
int is_non_terminal(char c);
void add_to_set(char set[], char c);
void print_set(char set[]);
void print_matrix(char matrix[][MAX], int rows, int cols);
int get_terminal_index(char c);
int get_non_terminal_index(char c);
void initialize_predict_table();
void add_to_predict_table(char non_terminal, char terminal, char rule[]);
void print_predict_table();

int main() {
    printf("Enter the number of rules: ");
    scanf("%d", &num_rules);

    printf("Enter the rules:\n");
    for (int i = 0; i < num_rules; i++) {
        scanf("%s", rules[i]);
    }

    // Find the non-terminals and terminals
    for (int i = 0; i < num_rules; i++) {
        char non_terminal = rules[i][0];
        if (!is_non_terminal(non_terminal)) {
            non_terminals[num_non_terminals++] = non_terminal;
        }

        for (int j = 2; j < strlen(rules[i]); j++) {
            char c = rules[i][j];

            if (is_non_terminal(c)) {
                if (!is_non_terminal(non_terminal)) {
                    add_to_set(first[get_non_terminal_index(non_terminal)], c);
                }
            } else {
                if (c != 'ε') {
                    if (!is_terminal(c)) {
                        terminals[num_terminals++] = c;
                    }
                    add_to_set(first[get_non_terminal_index(non_terminal)], c);
                    break;
                } else {
                    has_epsilon[get_non_terminal_index(non_terminal)] = 1;
                }
            }
        }
    }

    // Compute the first sets
    for (int i = 0; i < num_non_terminals; i++) {
        compute_first(i);
    }

    // Compute the follow sets
    compute_follow();

    // Print the first and follow sets
    printf("\nFirst sets:\n");
    for (int i = 0; i < num_non_terminals; i++) {
        printf("%c: ", non_terminals[i]);
        print_set(first[i]);
    }

    printf("\nFollow sets:\n");
    for (int i = 0; i < num_non_terminals; i++) {
        printf("%c: ", non_terminals[i]);
        print_set(follow[i]);
    }

    // Initialize the predict table
    initialize_predict_table();

    // Compute the predict table
    for (int i = 0; i < num_rules; i++) {
        char non_terminal = rules[i][0];
        int non_terminal_index = get_non_terminal_index(non_terminal);

        for (int j = 2; j < strlen(rules[i]); j++) {
            char c = rules[i][j];

            if (is_non_terminal(c)) {
                for (int k = 0; k < strlen(first[get_non_terminal_index(c)]); k++) {
                    char terminal = first[get_non_terminal_index(c)][k];
                    add_to_predict_table(non_terminal, terminal, rules[i]);
                }

                if (!has_epsilon[get_non_terminal_index(c)]) {
                    break;
                }
            } else {
                add_to_predict_table(non_terminal, c, rules[i]);
                break;
            }
        }

        if (has_epsilon[non_terminal_index]) {
            for (int k = 0; k < strlen(follow[non_terminal_index]); k++) {
                char terminal = follow[non_terminal_index][k];
                add_to_predict_table(non_terminal, terminal, rules[i]);
            }
        }
    }

    // Print the predict table
    printf("\nPredict table:\n");
    print_predict_table();

    // Parse an input string
    printf("\nEnter an input string: ");
    char input[MAX];
    scanf("%s", input);

    // Initialize the stack
    char stack[MAX];
    int top = -1;

    // Push the start symbol onto the stack
    stack[++top] = non_terminals[0];

    // Parse the input string
    int i = 0;
    while (i < strlen(input) && top >= 0) {
        char c = stack[top];

        if (is_terminal(c)) {
            if (c == input[i]) {
                top--;
                i++;
            } else {
                printf("\nError: Mismatched input symbol\n");
                break;
            }
        } else {
            int row = get_non_terminal_index(c);
            int col = get_terminal_index(input[i]);

            if (row == -1 || col == -1) {
                printf("\nError: Invalid symbol\n");
                break;
            }

            if (predict_table[row][col] != '-') {
                char rule[MAX];
                strcpy(rule, &(predict_table[row][col]));
                top--;

                for (int j = strlen(rule) - 1; j >= 2; j--) {
                    if (rule[j] != 'ε') {
                        stack[++top] = rule[j];
                    }
                }
            } else {
                printf("\nError: No rule found in predict table\n");
                break;
            }
        }
    }

    if (i == strlen(input) && top == -1) {
        printf("\nInput string is valid!\n");
    } else {
        printf("\nInput string is invalid!\n");
    }

    return 0;
}

void compute_first(int index) {
    char non_terminal = non_terminals[index];

    for (int i = 0; i < num_rules; i++) {
        if (rules[i][0] == non_terminal) {
            for (int j = 2; j < strlen(rules[i]); j++) {
                char c = rules[i][j];

                if (is_non_terminal(c)) {
                    int non_terminal_index = get_non_terminal_index(c);

                    for (int k = 0; k < strlen(first[non_terminal_index]); k++) {
                        add_to_set(first[index], first[non_terminal_index][k]);
                    }

                    if (!has_epsilon[non_terminal_index]) {
                        break;
                    }
                } else {
                    add_to_set(first[index], c);
                    break;
                }
            }
        }
    }
}

void compute_follow() {
    add_to_set(follow[0], '$');

    for (int i = 0; i < num_rules; i++) {
        for (int j = 2; j < strlen(rules[i]); j++) {
            char c = rules[i][j];

            if (is_non_terminal(c)) {
                int non_terminal_index = get_non_terminal_index(c);

                for (int k = j + 1; k < strlen(rules[i]); k++) {
                    char d = rules[i][k];

                    if (is_non_terminal(d)) {
                        int d_index = get_non_terminal_index(d);

                        for (int l = 0; l < strlen(first[d_index]); l++) {
                            if (first[d_index][l] != 'ε') {
                                add_to_set(follow[non_terminal_index], first[d_index][l]);
                            }
                        }

                        if (!has_epsilon[d_index]) {
                            break;
                        }
                    } else {
                        add_to_set(follow[non_terminal_index], d);
                        break;
                    }
                }

                if (j == strlen(rules[i]) - 1) {
                    int non_terminal_index = get_non_terminal_index(rules[i][0]);

                    for (int k = 0; k < strlen(follow[non_terminal_index]); k++) {
                        add_to_set(follow[index], follow[non_terminal_index][k]);
                    }
                }
            }
        }
    }
}

int is_terminal(char c) {
    for (int i = 0; i < num_terminals; i++) {
        if (terminals[i] == c) {
            return 1;
        }
    }

    return 0;
}

int is_non_terminal(char c) {
    for (int i = 0; i < num_non_terminals; i++) {
        if (non_terminals[i] == c) {
            return 1;
        }
    }

    return 0;
}

void add_to_set(char set[], char c) {
    if (strchr(set, c) == NULL) {
        int len = strlen(set);
        set[len] = c;
        set[len + 1] = '\0';
    }
}

void print_set(char set[]) {
    for (int i = 0; i < strlen(set); i++) {
        printf("%c ", set[i]);
    }

    printf("\n");
}

void print_matrix(char matrix[][MAX], int rows, int cols) {
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            printf("%c ", matrix[i][j]);
        }

        printf("\n");
    }
}

int get_terminal_index(char c) {
    for (int i = 0; i < num_terminals; i++) {
        if (terminals[i] == c) {
            return i;
        }
    }

    return -1;
}

int get_non_terminal_index(char c) {
    for (int i = 0; i < num_non_terminals; i++) {
        if (non_terminals[i] == c) {
            return i;
        }
    }

    return -1;
}

void initialize_predict_table() {
    for (int i = 0; i < num_non_terminals; i++) {
        for (int j = 0; j < num_terminals; j++) {
            predict_table[i][j] = '-';
        }
    }
}

void add_to_predict_table(char non_terminal, char terminal, char rule[]) {
    int row = get_non_terminal_index(non_terminal);
    int col = get_terminal_index(terminal);

    if (row != -1 && col != -1) {
        if (predict_table[row][col] == '-') {
            strcpy(&(predict_table[row][col]), rule);
        } else {
            printf("\nError: Ambiguous grammar\n");
            exit(1);
        }
    }
}

void print_predict_table() {
    printf("    ");

    for (int i = 0; i < num_terminals; i++) {
        printf("%c ", terminals[i]);
    }

    printf("\n");

    for (int i = 0; i < num_non_terminals; i++) {
        printf("%c | ", non_terminals[i]);

        for (int j = 0; j < num_terminals; j++) {
            printf("%c ", predict_table[i][j]);
        }

        printf("\n");
    }
}

该程序先从标准输入读入文法，然后计算出该文法的First集和Follow集，并构建预测分析表。最后，用户可以输入一个字符串，程序将使用栈和预测分析表来对该字符串进行分析。

注意：该程序仅支持包含终结符和非终结符的文法，不支持带有操作符和优先级的文法。