#include<conio.h>
#include<string.h>
struct emp{
char name[10];
int age;
};
File handling concept
void NameAndAgeStoring(){
struct emp e;
FILE *p, *q;
p= fopen(“list.txt”,”a”);
q= fopen(“list.txt”,”r”);
printf(“enter the name and age”);
scanf(“%s %d”,e.name,e.age);
fprintf(p,”%s %d”,e.name,e.age);
fclose(p);
do{
fscanf(q,”%s %d”,e.name,e.age);
printf(“%s %d”,e.name,e.age);
}
while(!feof(q));
getch();
}
File handling concept – Create and store value
void file()
{
FILE *fp;
char ch;
fp = fopen(“names.txt”, “w”);
while( ( ch= getchar())!=EOF){
putc(ch,fp);
}
fclose(fp);
}
string length without strlen()
void stringCal(){
int i;
char str[1000];
printf(“enter string value n”);
scanf(“%s”,str);
for(i=0; str[i] != ‘ ’;++i){
}
printf(” number of char entered %d”,i);
getch();
}
string reverse using pointer concept
int stringReverse(){
char str[1000], *ptr;
int i, len;
printf(“enter string n”);
gets(str);
ptr = str;
for(i=0; i <1000;i++)
{
if(*ptr == ‘ ’){
break;
}
ptr++;
}
len=i;
ptr–;
printf(“revered string: “);
for(i=len; i>0; i–){
printf(“%c”,*ptr–);
}
getch();
return 0;
}
search name in file – file concept
void SearchName(){
FILE *fp;
char ch[10],t[10], rep[10];
int flag=0;
printf(“enter the value to search n”);
gets(t);
fp = fopen(“names.dat”,”a+”);
//tp =fopen(“names.dat”,”w+”);
do{
fscanf(fp,”%sn”,ch);
if(strcmp(ch,t) == 0){
//printf(“%sn”,ch);
printf(“name found, enter the replacement value n”);
gets(rep);
flag=1;
fseek(fp,0,SEEK_SET);
fprintf(fp,”%sn”,rep);
fclose(fp);
break;
}else{
//printf(“not found n”);
}
}
while(!feof(fp));
fclose(fp);
if(flag==0)
{
printf(“name not matched n”);
}else
{
printf(“name replaced successfully n”);
}
getch();
}
