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C programming     int access ()  { char name [10]; int pin; int i, count, try; FILE *fp= fopen("id.txt","r"); if (fp==0) { printf("Error! \n"); return 0; } count = 0; while (fscanf(fp, "%s %d", passData[count].username, &passData[count].userpin) == 2 && count < MAX_NUMBER) { count++; } for(try = 0; try < 3; try++) { if ( try != 0 ) { printf("Try again.\n\n"); } printf("Please enter username and pin number: \n"); scanf("%s %d", name, &pin); for ( i = 0; i < count; i++ ) { if ((strcmp(name, passData[i].username) == 0) && (passData[i].userpin == pin)) { printf("\nAccess allowed!\n"); return 1; } } printf("Access refused. (%d/%d).\n", try + 1, 3); } return 0; }

C programming     int access ()  { char name [10]; int pin; int i, count, try; FILE *fp= fopen("id.txt","r"); if (fp==0) { printf("Error! \n"); return 0; } count = 0; while (fscanf(fp, "%s %d", passData[count].username, &passData[count].userpin) == 2 && count < MAX_NUMBER) { count++; } for(try = 0; try < 3; try++) { if ( try != 0 ) { printf("Try again.\n\n"); } printf("Please enter username and pin number: \n"); scanf("%s %d", name, &pin); for ( i = 0; i < count; i++ ) { if ((strcmp(name, passData[i].username) == 0) && (passData[i].userpin == pin)) { printf("\nAccess allowed!\n"); return 1; } } printf("Access refused. (%d/%d).\n", try + 1, 3); } return 0; }

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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C programming

 

<Draw flowchart>

 

int access () 
{
char name [10];
int pin;
int i, count, try;
FILE *fp= fopen("id.txt","r");
if (fp==0)
{
printf("Error! \n");
return 0;
}

count = 0;
while (fscanf(fp, "%s %d", passData[count].username, &passData[count].userpin) == 2 && count < MAX_NUMBER)
{
count++;
}

for(try = 0; try < 3; try++)
{
if ( try != 0 )
{
printf("Try again.\n\n");
}
printf("Please enter username and pin number: \n");
scanf("%s %d", name, &pin);

for ( i = 0; i < count; i++ )
{
if ((strcmp(name, passData[i].username) == 0) && (passData[i].userpin == pin))
{
printf("\nAccess allowed!\n");
return 1;
}
}
printf("Access refused. (%d/%d).\n", try + 1, 3);
}

return 0;
}

 

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