c语言学习——文件——统计文件字符

文件计算统计字符数量

#include 
#include 

int main(int argc, char *argv[]) {
    int ch;
    FILE *fp;
    unsigned long count = 0;
    if (argc != 2) {
        printf("Usage: %s filename\n", argv[0]);
        exit(EXIT_FAILURE);
    } else if (NULL == (fp = fopen(argv[1], "r"))) {
        printf("Can't open %s\n", argv[0]);
        exit(EXIT_FAILURE);
    }
    while (EOF != (ch = getc(fp))) {
        putc(ch, stdout);
        count++;
    }
    fclose(fp);
    printf("File %s has %lu characters\n", argv[1], count);
    return 0;
}

运行结果：

 

参考文献

C Primer Plus