完美解决C语言gcc编译器不能读取小数数据TXT文件的问题

在c文件目录下准备好一个write_ata2020.txt,内容如下:

0.841471 
0.909297 
0.14112 
-0.756802 
-0.958924 
-0.279415 
0.656987 
0.989358 
0.412118 
-0.544021 
-0.99999 
-0.536573 
0.420167 
0.990607 
0.650288 
-0.287903 
-0.961397 
-0.750987 
0.149877 
0.912945 

C程序为:


#include <stdio.h>

int main()
{
    double a[20];
    FILE *fpRead=fopen("write_ata2020.txt","r");
    if(fpRead==NULL)
    {
        return 0;
    }
    for(int i=0;i<20;i++)
    {
        fscanf(fpRead,"%lf ",&a[i]);
        printf("%lf \n",a[i]);
    }
    getchar();//等待

    return 1;
}

执行结果:

0.841471 
0.909297 
0.141120 
-0.756802 
-0.958924 
-0.279415 
0.656987 
0.989358 
0.412118 
-0.544021 
-0.999990 
-0.536573 
0.420167 
0.990607 
0.650288 
-0.287903 
-0.961397 
-0.750987 
0.149877 
0.912945 

附录例子:
读 float 格式 %f
读 double 格式 %lf
例子程序:

FILE *fp;
float x;
double y[10];
int i;
fp = fopen("abc.txt","r"); // 用读的方法打du开文件 abc.txt
fscanf(fp,"%f",&x); // 读 1 个 float 型的数zhidao
for (i=0;i<10;i++) 
fscanf(fp,"%lf",&y[i]); // 读 10 个 double 型的数
fclose(fp); // 关文件
printf("x=%f\n",x);
printf("y:\n");
for (i=0;i<10;i++) 
printf("%lf ",y[i]);

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转载自blog.csdn.net/weixin_41194129/article/details/107719558