改为：#include"stdio.h"void main(void){FILE *fp;float dense_zero,den;dense_zero=0.001;fp=fopen("dense.txt","w+");if(fp!=NULL)fprintf(fp,"%f",dense_zero);
fseek(fp,0l,SEEK_SET);fscanf(fp,"%f",&den);printf("the number is:");printf("%f\n",den);fclose(fp);}...
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