c语言 13

Posted 2021-06-08 小虾米2018

1、

#include <stdio.h>

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