#define _CRT_SECURE_NO_WARNINGS #include <stdio.h> int main() { int i; i = 0; char ch; FILE* fp; fp = fopen("data4.txt", "r"); if(fp==NULL) { printf("fail to open file\n"); return 1; } ch = fgetc(fp); while(ch!=EOF) { putchar(ch); ch = fgetc(fp); if (ch >= 33 && ch <= 126) i = i + 1; } i = i + 1; printf("\ndata4.txt中包含字符数(不计空格符):%d", i); fclose(fp); return 0; }
#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) { int i, j; for (i = 0; i < n; i = i + 1) s[i].sum = s[i].objective + s[i].subjective; STU a[1]; for(j=0;j<n;j=j+1) { for(i=0;i<10-j;i=i+1) { if(s[i].sum<s[i+1].sum) { a[0] = s[i]; s[i] = s[i + 1]; s[i + 1] = a[0]; } } } for (i = 0; i < 1; i++) strcpy(s[i].level, "优秀"); for (i = 1; i < 5; i++) strcpy(s[i].level, "合格"); for (i = 5; i < 10; i++) strcpy(s[i].level, "不合格"); }
#define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> #include <time.h> #define N 80 typedef struct { long int id; char name[20]; char _class[100]; }STU; void input(STU s[], int n); void output(STU a[], int n); void process(STU s[], STU a[], int n); int main() { STU stu[N], a[5]; input(stu, N); process(stu, a, N); output(a, 5); return 0; } void input(STU s[],int n) { int i; FILE* fin; fin = fopen("list.txt", "r"); if(fin==NULL) { printf("fail to open file\n"); exit(0); } while(!feof(fin)) { for (i = 0; i < n; i = i + 1) fscanf(fin, "%ld %s %s", &s[i].id, &s[i].name, &s[i]._class); } fclose(fin); } void output(STU a[],int n) { FILE* fout; int i; printf("\n"); for (i = 0; i < n; i = i + 1) printf("%ld %s %s\n", a[i].id, a[i].name, a[i]._class); fout = fopen("lucky.txt", "w"); if(!fout) { printf("fail to open or create lucky.txt\n"); exit(0); } for (i = 0; i < n; i = i + 1) fprintf(fout, "%ld %s %s\n", a[i].id, a[i].name, a[i]._class); fclose(fout); } void process(STU s[],STU a[], int n) { int b1, b2, b3, b4, b5; srand(time(0)); b1 = rand() % 80 + 1; b2 = rand() % 80 + 1; b3 = rand() % 80 + 1; b4 = rand() % 80 + 1; b5 = rand() % 80 + 1; a[0] = s[b1]; a[1] = s[b2]; a[2] = s[b3]; a[3] = s[b4]; a[4] = s[b5]; }
标签:ch,int,void,STU,实验,printf,include From: https://www.cnblogs.com/chennana/p/17483034.html