C语言实现文件读写操作

2023-07-07 18:04:06 65

#include #include intmain() { FILE*fp; charstring[6];//方括号中是几就输入几个字符串 if((fp=fopen("file.txt","w"))==NULL) { printf("cannotopenfile"); return0; } while(strlen(gets(string))>0) { fputs(string,fp); fputs("\n",fp); } fclose(fp); if((fp=fopen("file.txt","r"))==NULL) { printf("cannotopenfile\n"); return0; } while(fgets(string,6,fp)!=NULL) { fputs(string,stdout);//系统自动打开stdout文件 } fclose(fp); }

#include #include intmain() { FILE*fp1,*fp2,*fp3; charstr1[10],str2[10]; printf("输入两串字母\n"); scanf("%s",str1); scanf("%s",str2); //A,B两个文件赋值 if((fp1=fopen("A.txt","w"))==NULL) { printf("cannotopenfile\n"); return0; } fputs(str1,fp1); fclose(fp1); if((fp2=fopen("B.txt","w"))==NULL) { printf("cannotopenfile\n"); return0; } fputs(str2,fp2); fclose(fp2); //拷贝到第三个文件 if((fp1=fopen("A.txt","r"))==NULL) { printf("cannotopenfile\n"); return0; } if((fp2=fopen("B.txt","r"))==NULL) { printf("cannotopenfile\n"); return0; } if((fp3=fopen("C.txt","a"))==NULL) { printf("cannotopenfile\n"); return0; } while(!feof(fp1)) { fputc(fgetc(fp1),fp3); } while(!feof(fp2)) { fputc(fgetc(fp2),fp3); } fclose(fp1); fclose(fp2); fclose(fp3); }

#include #defineSIZE4 structstudent_type { charname[10]; intnum; intage; charaddr[15]; }; structstudent_typestud[SIZE]; voidsave(); voiddisplay(); voidmain() { inti; for(i=0;i

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C语言实现文件读写操作

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