如何将一个数组写入文件中并读取出来
这篇文章主要讲了如何将一个数组写入文件中并读取出来 ,有一定的参考价值,感兴趣的朋友可以参考一下,希望对你有所帮助!
#include<stdio.h> #define N 5 int main(){ //从键盘输入的数据放入a,从文件读取的数据放入b int a[N], b[N]; int i, size = sizeof(int); FILE *fp; if( (fp=fopen("D:\\demo.txt", "rb+")) == NULL ){ printf("Cannot open file, press any key to exit!\n"); getch(); exit(1); } //从键盘输入数据 并保存到数组a for(i=0; i<N; i++){ scanf("%d", &a[i]); } //将数组a的内容写入到文件 fwrite(a, size, N, fp); //将文件中的位置指针重新定位到文件开头 rewind(fp); //从文件读取内容并保存到数组b fread(b, size, N, fp); //在屏幕上显示数组b的内容 for(i=0; i<N; i++){ printf("%d ", b[i]); } printf("\n"); fclose(fp); return 0; }
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