c语言 13-1113-12

Posted 2021-06-11 小虾米2018

1、13-11

#include <stdio.h>

int main(void)
{
    FILE *fp;
    int i;
    double b[10];
    double a[] = {0.1,1.1,2.1,3.1,4.1,5.1,6.1,7.1,8.1,9.1};
    
    if((fp = fopen("tmp.bin", "wb")) == NULL)
        printf("\\aFile open failed.\\n");
    else
    {
        fwrite(a, sizeof(double), 10, fp);
        fclose(fp); 
    }
    
    if((fp = fopen("tmp.bin", "rb")) == NULL)
        printf("\\aFile open failed.\\n");
    else
    {
        fread(b, sizeof(double), 10, fp);
        fclose(fp);
        for(i = 0; i < 10; i++)
        {
            printf("b[%d] = %.2f.\\n", i, b[i]);
        }
    }
    return 0;
}