#include <stdio.h> #define N 7 #define M 80 typedef struct { char name[M]; // 书名 char author[M]; // 作者 } Book; int main() { Book x[N] = { {"《雕塑家》", "斯科特.麦克劳德"}, {"《灯塔》", "克里斯多夫.夏布特"}, {"《五号屠宰场》", "库尔特.冯内古特"}, {"《出卖月亮的人》", "罗伯特.海因莱茵"}, {"《大地之上》", "罗欣顿·米斯特里"}, {"《上学记》", "何兆武"}, {"《命运》", "蔡崇达"} }; int i; FILE *fp;// 以写的方式打开文本文件data1.txt fp = fopen("data1.txt", "w"); // 如果打开文件失败,输出提示信息并返回 if(fp == NULL) { printf("fail to open file\n"); return 1; } // 将结构体数组x中的图书信息写到fp指向的文件data1.txt // 同时也输出到屏幕上 for(i = 0; i < N; ++i){ fprintf(fp, "%-20s %-20s\n", x[i].name, x[i].author); printf("%-20s %-20s\n", x[i].name, x[i].author); } fclose(fp); return 0; }
#define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #define N 10 #define M 80 typedef struct { char name[M]; // 书名 char author[M]; // 作者 } Book; int main() { Book x[N]; int i, n; FILE* fp; fp = fopen("data1.txt", "r"); if (fp == NULL) { printf("fail to open file\n"); return 1; } i = 0; while (!feof(fp)) { fscanf(fp, "%s%s", x[i].name, x[i].author); ++i; } n = i - 1; for (i = 0; i < n; ++i) printf("%d. %-20s%-20s\n", i + 1, x[i].name, x[i].aut
hor); fclose(fp); return 0; }
#include <stdio.h> #define N 7 #define M 80 typedef struct { char name[M]; // 书名 char author[M]; // 作者 } Book; int main() { Book x[N] = { {"《雕塑家》", "斯科特.麦克劳德"}, {"《灯塔》", "克里斯多夫.夏布特"}, {"《五号屠宰场》", "库尔特.冯内古特"}, {"《出卖月亮的人》", "罗伯特.海因莱茵"}, {"《大地之上》", "罗欣顿·米斯特里"}, {"《上学记》", "何兆武"}, {"《命运》", "蔡崇达"} }; int i; FILE *fp; // 以写的方式打开二进制文件data2.dat fp = fopen("data2.dat", "wb"); // 如果打开文件失败,输出提示信息并返回 if(fp == NULL) { printf("fail to open file\n"); return 1; } // 将结构体数组x中的图书信息以数据块方式写入文件data2.dat fwrite(x, sizeof(Book), N, fp); fclose(fp); return 0; }
#define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #define N 7 #define M 80 typedef struct { char name[M]; // 书名 char author[M]; // 作者 } Book; int main() { Book x[N]; int i; FILE* fp; fp = fopen("data2.dat", "rb"); if (fp == NULL) { printf("fail to open file\n"); return 1; } fread(x, sizeof(Book), N, fp); for (i = 0; i < N; ++i) printf("%d. %-20s%-20s\n", i + 1, x[i].name, x[i].author); fclose(fp); return 0; }
#include <stdio.h> #define N 5 #define M 80 int main() { char songs[N][M] = { "Working\'s Blues", "Everything Will Flow", "Streets of London", "Perfect Day", "Philadelphia"}; int i; FILE *fp; fp = fopen("data3.txt", "w"); if(fp == NULL) { printf("fail to open file\n"); return 1; } for(i = 0; i < N; ++i) { fputs(songs[i], fp);fputs("\n", fp); } fclose(fp); return 0; }
#include <stdio.h> #define N 5 #define M 80 // int main() { char songs[N][M]; int i; FILE* fp; fp = fopen("data3.txt", "r"); if (fp == NULL) { printf("fail to open file\n"); return 1; } for (i = 0; i < N; ++i) fgets(songs[i], 80, fp); for (i = 0; i < N; ++i) printf("%d. %s", i + 1, songs[i]); fclose(fp); return 0; }
#include <stdio.h> int main() { char ch; FILE* fp; fp = fopen("data3.txt", "r"); if (fp == NULL) { printf("fail to open file\n"); return 1; } ch = fgetc(fp); while (ch != EOF) { putchar(ch); ch = fgetc(fp); } fclose(fp); return 0; }
#define _CRT_SECURE_NO_WARNINGS #include<stdio.h> int main() { int num=0; FILE* fp; char ch; if ((fp = fopen("data4.txt", "r"))==NULL) printf("fail to open it"); ch = fgetc(fp); while (!feof(fp)) { if (ch != ' ' && ch!= '\n' ) num++; ch = fgetc(fp); } fclose(fp); printf("%d", num); }
#define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <string.h> #include <stdlib.h> #define N 10 typedef struct { long int id; char name[20]; float objective; // 客观题得分 float subjective; // 操作题得分 float sum; char level[10]; } STU; // 函数声明 void input(STU s[], int n); void output(STU s[], int n); void process(STU s[], int n); int main() { STU stu[N]; printf("从文件读入%d个考生信息: 准考证号,姓名,客观题得分(<=40),操作题得分(<=60)\n", N); input(stu, N); printf("\n对考生信息进行处理: 计算总分,确定等级\n"); process(stu, N); printf("\n打印考生完整信息, 并保存到文件中"); output(stu, N); return 0; } // 从文本文件examinee.txt读入考生信息:准考证号,姓名,客观题得分,操作题得分 void input(STU s[], int n) { int i; FILE* fin; fin = fopen("examinee.txt", "r"); if (fin == NULL) { printf("fail to open file\n"); exit(0); } while (!feof(fin)) { for (i = 0; i < n; i++) fscanf(fin, "%ld %s %f %f", &s[i].id, s[i].name, &s[i].objective, &s[i].subjective); } fclose(fin); } // 输出考生完整信息: 准考证号,姓名,客观题得分,操作题得分,总分,等级 // 不仅输出到屏幕上,还写到文本文件result.txt中 void output(STU s[], int n) { FILE* fout; int i; // 输出到屏幕 printf("\n"); printf("准考证号\t姓名\t客观题得分\t操作题得分\t总分\t\t等级\n"); for (i = 0; i < n; i++) printf("%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].level); // 保存到文件 fout = fopen("result.txt", "w"); if (!fout) { printf("fail to open or create result.txt\n"); exit(0); } fprintf(fout, "准考证号\t\t姓名\t客观题得分\t操作题得分\t总分\t\t等级\n"); for (i = 0; i < n; i++) fprintf(fout, "%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].level); fclose(fout); } // 对考生信息进行处理:计算总分,排序,确定等级 void process(STU s[], int n) { STU temp; int i, j, k; for (i = 0; i < N; i++) { s[i].sum = s[i].objective + s[i].subjective ; } for (i = 0; i < N - 1; i++) { for (j = 0; j < N - i - 1; j++) { if (s[j].sum < s[j + 1].sum) { temp = s[j + 1]; s[j + 1] = s[j]; s[j] = temp; } } } for (k = 0; k < N; k++) { switch (k) { case 0:strcpy(s[k].level, "优秀"); break; case 1: case 2: case 3: case 4:strcpy(s[k].level, "合格"); break; case 5: case 6: case 7: case 8: case 9:strcpy(s[k].level, "不合格"); break; } } }
#define _CRT_SECURE_NO_WARNINGS #include<stdio.h> #include<stdlib.h> #include<time.h> #include<string.h> #define N 80 #define M 5 typedef struct { long no; char name[10]; char class[20]; }STU; int main() { STU list[N],lucky[M]; FILE* fp1,*fp2; int i,j,random; if ((fp1 = fopen("list.txt", "r")) == NULL) printf("fail to open it"); for (i = 0; i < N; i++) fscanf(fp1, "%ld %s %s", &list[i].no, list[i].name, list[i].class); fclose(fp1); srand((unsigned int)time(NULL)); for (j = 0; j < M; j++) { random = rand() % N + 1; lucky[j] = list[random]; } if ((fp2 = fopen("lucky.txt", "w")) == NULL) printf("fail to open it"); for (j = 0; j < M; j++) fprintf(fp2, "%ld %s %s\n", lucky[j].no, lucky[j].name, lucky[j].class); fclose(fp2); }
标签:fp,文件,int,编程,char,实验,printf,include,define From: https://www.cnblogs.com/t110e5/p/17006683.html