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  • c语言中使用fscanf函数从文件读取数据(逐行读取并保存变量)

    1、

    #include <stdio.h>
    
    int main(void)
    {
        FILE *fp;
        int lines = 0;
        char name[128];
        double height, weight;
        double hsum = 0, wsum = 0;
        
        if((fp = fopen("a.txt", "r")) == NULL)
            printf("aFile open failed.
    ");
        else
        {
            while(fscanf(fp, "%s%lf%lf", name, &height, &weight) == 3)
            {
                printf("%-10s %5.1f %5.1f
    ", name, height, weight);
                lines++;
                hsum += height;
                wsum += weight;
            }
            puts("
    ==================================
    ");
            printf("average   %5.1f %5.1f
    ", hsum/lines, wsum/lines);
            fclose(fp); 
        }
        return 0;
    }

    #include <stdio.h>
    
    int main(void)
    {
        FILE *fp;
        int lines = 0;
        char name[128];
        double height, weight;
        double hsum = 0, wsum = 0;
        
        if((fp = fopen("a.txt", "r")) == NULL)
            printf("aFile open failed.
    ");
        else
        {
            while(fscanf(fp, "%s%lf%lf", name, &height, &weight) != EOF)
            {
                printf("%-10s %5.1f %5.1f
    ", name, height, weight);
                lines++;
                hsum += height;
                wsum += weight;
            }
            puts("
    ==================================
    ");
            printf("average   %5.1f %5.1f
    ", hsum/lines, wsum/lines);
            fclose(fp); 
        }
        return 0;
    }

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  • 原文地址:https://www.cnblogs.com/liujiaxin2018/p/14872251.html
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