Working with structures and files

Author: its-Kumar

6_STRUCT/IT.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+struct IT
+{
+	int roll;
+	char name[20];
+	float per;
+} s[10];
+void main()
+{
+
+	void input();
+	void display();
+
+	printf("Enter Roll no, Name, Marks%:\n");
+	input();
+	printf("\n your data is:\n");
+	display();
+}
+void input()
+{
+	int i;
+	for (i = 0; i <= 2; i++)
+	{
+		scanf("%d%s%f", &s[i].roll, s[i].name, &s[i].per);
+	}
+}
+void display()
+{
+	int i;
+
+	for (i = 0; i <= 2; i++)
+	{
+		printf("Roll=%d Name:%s per=%f\n", s[i].roll, s[i].name, s[i].per);
+		printf("name");
+		if (s[i].roll % 2 == 0)
+			printf("Name=%s\n", s[i].name);
+	}
+}

6_STRUCT/Rectangle_check.c

@@ -0,0 +1,43 @@
+//check if two rectangles overlap with each other
+
+#include <stdio.h>
+typedef struct
+{
+	int x, y;
+} point;
+
+typedef struct
+{
+	point l; //top left point
+	point r; //bottom right point
+} rectangle;
+
+typedef enum
+{
+	false,
+	true
+} boolean;
+
+boolean Do_overlap(rectangle R1, rectangle R2)
+{
+	if (R2.r.x < R1.l.x || R2.l.x > R1.r.x)
+		return false;
+	if (R1.l.y < R2.r.y || R2.l.y < R1.r.y)
+		return false;
+	return true;
+}
+void main()
+{
+	rectangle R1, R2;
+
+	printf("Enter the co-ordinates for rectangle 1:");
+	scanf("%d%d", &R1.l.x, &R1.l.y);
+	scanf("%d%d", &R1.r.x, &R1.r.y);
+	printf("Enter the co-ordinates for rectangle 2:");
+	scanf("%d%d", &R2.l.x, &R2.l.y);
+	scanf("%d%d", &R2.r.x, &R2.r.y);
+	if (Do_overlap(R1, R2))
+		printf("Rectangle overlaps");
+	else
+		printf("Rectangle does not overlaps");
+}

6_STRUCT/dates.c

@@ -0,0 +1,20 @@
+#include <stdio.h>
+
+struct date
+{
+	int dd;
+	int mm;
+	int yy;
+} d1, d2;
+
+int main()
+{
+	printf("Input two dates(DD/MM/YY): ");
+	scanf("%d%*c%d%*c%d", &d1.dd, &d1.mm, &d1.yy);
+	scanf("%d%*c%d%*c%d", &d2.dd, &d2.mm, &d2.yy);
+	if ((d1.dd == d2.dd) && (d1.mm == d2.mm) && (d1.yy == d2.yy))
+		printf("dates are equal");
+	else
+		printf("dates not are equal");
+	return 0;
+}

6_STRUCT/students.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+
+struct students
+{
+	int roll_no, year;
+	char name[20], department[20], course[20];
+};
+
+void main()
+{
+	struct students s[10];
+	int i, y;
+
+	for (i = 0; i < 10; i++)
+	{
+		printf("Enter Roll No, Name, Department,Course,Year of Joining of s[%d]:\n", i);
+		scanf("%d%s%s%s%d", &s[i].roll_no, s[i].name, s[i].department, s[i].course, &s[i].year);
+	}
+	printf("Enter The Year to Check the Data:\n");
+	scanf("%d", &y);
+	printf("\n\nThe Students who joined in the year %d:\n", y);
+	for (i = 0; i < 10; i++)
+	{
+		if (y == s[i].year)
+		{
+			printf("\nRoll No.= %d\tName =%s\tDepartment =%s\tCourse =%s", s[i].roll_no, s[i].name, s[i].department, s[i].course);
+		}
+	}
+}

7_FILE/CopyTheContentOfFile.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+
+void main()
+{
+	FILE *fs, *ft;
+	char ch;
+	fs = fopen("abc.txt", "r");
+	if (fs == NULL)
+	{
+		printf("\nUnable to open source file......");
+		return 0;
+		exit(0);
+	}
+	ft = fopen("nnnm", "w");
+	if (ft == NULL)
+	{
+		printf("\nUnable to open target file......");
+		return 0;
+		exit(0);
+	}
+	while (1)
+	{
+		ch = fgetc(fs);
+		fputc(ch, ft);
+		if (ch == EOF)
+			break;
+	}
+	fclose(fs);
+	fclose(ft);
+	printf("File copied successfully.......");
+}

7_FILE/CountCharacters.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+
+void main()
+{
+	int noc, nob, nol;
+	FILE *fp;
+	char ch;
+	fp = fopen("45.c", "r");
+	if (fp == NULL)
+	{
+		printf("\nUnable to open source file......");
+		return 0;
+		exit(0);
+	}
+
+	while (1)
+	{
+		ch = fgetc(fp);
+		if (ch == EOF)
+			break;
+		if (ch == ' ')
+			nob++;
+		if (ch == '\n')
+			nol++;
+		noc++;
+	}
+	fclose(fp);
+	printf("\nBlanks = %d\nLines = %d\nCharacters = %d", nob, nol, noc);
+}

7_FILE/FILE1.c

@@ -0,0 +1,35 @@
+// writes records to a file using structure
+#include <stdio.h>
+
+#include <stdlib.h>
+
+void main()
+{
+	FILE *fp;
+	char another = 'y';
+	struct emp
+	{
+		char name[40];
+		int age;
+		float bs;
+	};
+	struct emp e;
+
+	fp = fopen("EMPLOYEE.DAT", "w");
+	if (fp == NULL)
+	{
+		puts("Cannot Open File....");
+		exit(1);
+	}
+	while (another == 'y')
+	{
+		printf("\nEnter name,age and basic salary:");
+		scanf("%s %d %f", e.name, &e.age, &e.bs);
+		fprintf(fp, "%s %d %f\n", e.name, e.age, e.bs);
+
+		printf("ADD Another record(y/n):");
+		fflush(stdin);
+		another = getche();
+	}
+	fclose(fp);
+}

7_FILE/FILE2.c

@@ -0,0 +1,27 @@
+// read records to a file using structure
+#include <stdio.h>
+
+#include <stdlib.h>
+
+void main()
+{
+	FILE *fp;
+	struct emp
+	{
+		char name[40];
+		int age;
+		float bs;
+	};
+	struct emp e;
+
+	fp = fopen("EMPLOYEE.DAT", "r");
+	if (fp == NULL)
+	{
+		puts("Cannot Open File....");
+		exit(1);
+	}
+	while (fscanf(fp, "%s %d %f", e.name, &e.age, &e.bs) != EOF)
+		printf("\n%s %d %f", e.name, e.age, e.bs);
+
+	fclose(fp);
+}

7_FILE/FILE3.c

@@ -0,0 +1,35 @@
+// writes records to a file using structure in binary mode
+#include <stdio.h>
+
+#include <stdlib.h>
+
+void main()
+{
+	FILE *fp;
+	char another = 'y';
+	struct emp
+	{
+		char name[40];
+		int age;
+		float bs;
+	};
+	struct emp e;
+
+	fp = fopen("EMPLOYEE.DAT", "wb");
+	if (fp == NULL)
+	{
+		puts("Cannot Open File....");
+		exit(1);
+	}
+	while (another == 'y')
+	{
+		printf("\nEnter name,age and basic salary:");
+		scanf("%s %d %f", e.name, &e.age, &e.bs);
+		fwrite(&e, sizeof(e), 1, fp);
+
+		printf("ADD Another record(y/n):");
+		fflush(stdin);
+		another = getche();
+	}
+	fclose(fp);
+}

7_FILE/FILE4.c

@@ -0,0 +1,27 @@
+// read records to a file using structure in binary mode
+#include <stdio.h>
+
+#include <stdlib.h>
+
+void main()
+{
+	FILE *fp;
+	struct emp
+	{
+		char name[40];
+		int age;
+		float bs;
+	};
+	struct emp e;
+
+	fp = fopen("EMPLOYEE.DAT", "r");
+	if (fp == NULL)
+	{
+		puts("Cannot Open File....");
+		exit(1);
+	}
+	while (fread(&e, sizeof(e), 1, fp) == 1)
+		printf("\n%s %d %f", e.name, e.age, e.bs);
+
+	fclose(fp);
+}

7_FILE/FILEcopy.c

@@ -0,0 +1,39 @@
+//File copy by using argc and argv
+
+#include <stdio.h>
+#include <stdlib.h>
+
+void main(int argc, char *argv[])
+{
+	FILE *ft, *fs;
+	char ch;
+
+	if (argc != 3)
+	{
+		puts("improper number of arguments");
+		exit(0);
+	}
+	fs = fopen(argv[1], "r");
+	if (fs == NULL)
+	{
+		puts("Cannot open source file....");
+		exit(0);
+	}
+	ft = fopen(argv[2], "w");
+	if (ft == NULL)
+	{
+		puts("Cannot open target file....");
+		fclose(fs);
+		exit(0);
+	}
+	while (1)
+	{
+		ch = fgetc(fs);
+		if (ch == EOF)
+			break;
+		else
+			fputc(ch, ft);
+	}
+	fclose(fs);
+	fclose(ft);
+}