计算机二级-计算机二级考试C语言题集+题解.zip

#include <stdio.h> #define N 5 typedef struct student { long sno; char name[10]; float score[3]; } STU; void fun(char *filename, STU n) { FILE *fp; /**********found**********/ fp = fopen(__1__, "rb+"); /**********found**********/ fseek(__2__, -(long)sizeof(STU), SEEK_END); /**********found**********/ fwrite(&n, sizeof(STU), 1, __3__); fclose(fp); } void main() { STU t[N]={ {10001,"MaChao", 91, 92, 77}, {10002,"CaoKai", 75, 60, 88}, {10003,"LiSi", 85, 70, 78}, {10004,"FangFang", 90, 82, 87}, {10005,"ZhangSan", 95, 80, 88}}; STU n={10006,"ZhaoSi", 55, 70, 68}, ss[N]; int i,j; FILE *fp; fp = fopen("student.dat", "wb"); fwrite(t, sizeof(STU), N, fp); fclose(fp); fp = fopen("student.dat", "rb"); fread(ss, sizeof(STU), N, fp); fclose(fp); printf("\nThe original data :\n\n"); for (j=0; j<N; j++) { printf("\nNo: %ld Name: %-8s Scores: ",ss[j].sno, ss[j].name); for (i=0; i<3; i++) printf("%6.2f ", ss[j].score[i]); printf("\n"); } fun("student.dat", n); printf("\nThe data after modifing :\n\n"); fp = fopen("student.dat", "rb"); fread(ss, sizeof(STU), N, fp); fclose(fp); for (j=0; j<N; j++) { printf("\nNo: %ld Name: %-8s Scores: ",ss[j].sno, ss[j].name); for (i=0; i<3; i++) printf("%6.2f ", ss[j].score[i]); printf("\n"); } }