linux c语言命令行参数

int main(int argc, char *argv[])

#include <stdio.h>

int main(int argc, char *argv[]) {
    if (argc < 2) {
        printf("Usage: %s <option>\n", argv[0]);
        return 1;
    }

    for (int i = 1; i < argc; i++) {
        if (strcmp(argv[i], "-v") == 0) {
            printf("Verbose mode enabled\n");
        } else if (strcmp(argv[i], "-f") == 0 && i + 1 < argc) {
            printf("Processing file: %s\n", argv[++i]);
        } else {
            printf("Unknown option: %s\n", argv[i]);
        }
    }

    return 0;
}

if (strcmp(argv[i], "-f") == 0 && i + 1 < argc) {
    // 正确处理文件参数
} else {
    fprintf(stderr, "Invalid argument: %s\n", argv[i]);
    return 1;
}

if (argc < 3) {
    fprintf(stderr, "Usage: %s -f <filename>\n", argv[0]);
    return 1;
}

if (strcmp(argv[1], "-f") != 0) {
    fprintf(stderr, "Error: -f option must be first.\n");
    return 1;
}