1 void fun(char *filename, STU n)
2 { FILE *fp;
3 fp = fopen(__filename__, "rb+");
4 fseek(__fp__, ‐(long)sizeof(STU), SEEK_END);
5 //fseek(FILE *stream,long offset,int fromwhere)
6 //重定位流上的文件指针
7 fwrite(&n, sizeof(STU), 1, __fp__);
8 fclose(fp);
9 }
1 #include <stdlib.h>
2 #include <stdio.h>
3 #define N 10
4 double fun(double x[],double *y)
5 { int i,j; double av;
6 av=__0.0__; //
7 for(i=0; i<N; i++)
8 av=av+__x[i]/N__; //
9 for(i=j ...


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