c语言 13 - 7

1、

#include <stdio.h>

int main(void)
{
    FILE *fp;
    int ch;
    
    char filename[FILENAME_MAX];
    printf("filename: "); scanf("%s", filename);
    
    if((fp = fopen(filename, "r")) == NULL)
        printf("\afile open failed.\n");
    else
    {
        int num = 0;
        while((ch = fgetc(fp)) != EOF)
        {
            if(ch != '\n')
                num++;
        }
        fclose(fp);
        printf("characters number is: %d\n", num);
    }
    
    return 0;
}