task4
编程代码
#include <stdio.h> #include <stdlib.h> int main() { FILE *fp; int x = 0; char ch; if((fp = fopen("d:\\data4.txt", "r")) == NULL) { printf("Fail to initialize\n"); exit(0); } ch = fgetc(fp); while(ch != EOF) { if(ch != ' ' && ch != '\n') x++; ch = fgetc(fp); } printf("data4.txt中共包含字符数(不计空白符):%d\n", x); return 0; }
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task5
编程代码
#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) { // 补足代码 // ××× int i,j,m=0; STU t; 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-1-i;j++){ if(s[j].sum<s[j+1].sum) {t=s[j]; s[j]=s[j+1]; s[j+1]=t;}}} for(i=0;i<N;i++) {if(i==0) strcpy(s[i].level ,"优秀"); else if(i>0&&i<4) strcpy(s[i].level,"合格"); else strcpy(s[i].level,"不合格");} }
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task6
编程代码
#include <stdio.h> #include <string.h> #include <stdlib.h> #include<time.h> #define N 80 typedef struct { long int id; char name[20]; char clas[100]; int num; } 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() { int i,index=0,random=0; int ran[5]={0}; STU stu[N],r[N]; input(stu, N); process(stu, N); srand((unsigned)time(NULL)); while(index<5){ random=rand()%80; ran[index]=random%100; index++;} for(i=0;i<5;i++) {r[i]=stu[ran[i]];} output(r, N); system("pause"); 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++) fscanf(fin, "%ld %s %s", &s[i].id, s[i].name, &s[i].clas); } fclose(fin); } void output(STU s[], int n) { FILE *fout; int i; printf("\n"); for (i = 0; i < 5; i++) printf("%ld\t\t%s\t%s\t\n", s[i].id, s[i].name, s[i].clas); fout = fopen("lucky.txt", "w"); if (!fout) { printf("fail to open or create result.txt\n"); exit(0); } for (i = 0; i < 5; i++) fprintf(fout, "%ld\t\t%s\t%s\t\t", s[i].id, s[i].name, s[i].clas); fclose(fout); } void process(STU s[], int n) { int i; for(i=0;i<N;i++) s[i].num=i; }
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标签:ch,int,void,char,STU,实验,include From: https://www.cnblogs.com/1qq2ww3ee/p/17476780.html