#include <stdio.h> #include <string.h> #include <stdlib.h> int main(){ FILE *fp; fp=fopen( "data4.txt" , "r" ); char ch= 'a' ; int i=0; do { ch=fgetc(fp); if (ch!= ' ' &&ch!= '\n' &&ch!= '\t' ) i++; } while (!feof(fp)); printf( "%d" ,i-1); fclose(fp); return 0; } |
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#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; for (i=0;i<n;i++) s[i].sum=s[i].subjective+s[i].objective; int j; STU t; for (j=0;j<n-1;j++) for (i=0;i<n-1;i++) if (s[i].sum<s[i+1].sum) { t=s[i+1]; s[i+1]=s[i]; s[i]=t; } for (i=0;i<n;i++) if (1.0*i/10<=0.1) strcpy(s[i].level, "优秀" ); else if (1.0*i/10<=0.5) strcpy(s[i].level, "合格" ); else strcpy(s[i].level, "不合格" ); } |
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#include <stdio.h> #include <string.h> #include <stdlib.h> #include <time.h> #define N 80 typedef struct { long no; char name[40]; char cla[40]; }STU; int main() { int i; FILE *fp; fp=fopen( "list.txt" , "r" ); if (fp == NULL) { printf( "fail to open file\n" ); exit(0); } STU s[80]; STU b[5]; while (!feof(fp)) { for (i = 0; i <N; i++) fscanf(fp, "%ld %s %s" , &s[i].no, s[i].name,s[i].cla); } srand(time(0)); int a; for ( int j=0;j<5;j++) { a=rand()%80; b[j]=s[a]; } for ( int j=0;j<5;j++) printf( "%-20ld%-20s%-20s\n" ,b[j].no,b[j].name,b[j].cla); fclose(fp); FILE *fin; fin=fopen( "lucky.txt" , "w" ); for ( int j=0;j<5;j++) fprintf(fin, "%-20ld%-20s%-20s\n" ,b[j].no,b[j].name,b[j].cla); fclose(fin); return 0; } |