Added a lot of more Good Basic Programs

File handling/dat file.c

@@ -0,0 +1,20 @@
+#include<stdio.h>
+struct bank
+{
+    int bookid;
+    char name[25];
+    float rate;
+};
+main()
+{
+    struct bank b1;
+    FILE *fp;
+    fp=fopen("f5.dat","wb");
+    printf("Enter bookid name and rate:\n");
+    scanf("%d",&b1.bookid);
+    fflush(stdin);
+    gets(b1.name);
+    scanf("%f",&b1.rate);
+    fwrite(&b1,sizeof(b1),1,fp);
+    fclose(fp);
+}

File handling/f1.c

@@ -0,0 +1,18 @@
+#include<stdio.h>
+main()
+{
+    int i;
+    FILE *fp;
+    char str[]="Amee Computer class Batch 1 sneh";
+    fp=fopen("f1.txt","w");
+    if(fp==NULL)
+    {
+        printf("File cannot be opened.\n");
+        exit(1);
+    }
+    for(i=0;i<strlen(str);i++)
+    {
+        fputc(str[i],fp);
+    }
+    fclose(fp);
+}

File handling/f1.txt

@@ -0,0 +1 @@
+Amee Computer class Batch 1 sneh

File handling/fputs.c

@@ -0,0 +1,16 @@
+#include<stdio.h>
+main()
+{
+    char ch[20];
+    FILE *fp;
+    fp=fopen("juju1.txt","w");
+    if(fp==NULL)
+    {
+        printf("File not found.\n");
+        exit(1);
+    }
+    printf("Enter string:\n");
+    gets(ch);
+    fputs(ch,fp);
+    fclose(fp);
+}

File handling/juju.txt

@@ -0,0 +1 @@
+Sneh chauhan

File handling/juju1.txt

@@ -0,0 +1 @@
+snehchauhan

File handling/reading from a file using fgets.c

@@ -0,0 +1,18 @@
+/*To read from a file using fgets() */
+#include<stdio.h>
+main()
+{
+    char ch[20];
+    FILE *fp;
+    fp=fopen("juju.txt","r");
+    if(fp==NULL)
+    {
+        printf("File not found.\n");
+        exit(1);
+    }
+    while(fgets(ch,8,fp)!=NULL)
+    {
+        printf("%s",ch);
+    }
+    fclose(fp);
+}

File handling/sns.c

@@ -0,0 +1,19 @@
+#include<stdio.h>
+main()
+{
+    char ch;
+    FILE *fp;
+    fp=fopen("juju.txt","r");
+    if(fp==NULL)
+    {
+        printf("File not found.\n");
+        exit(0);
+    }
+    ch=fgetc(fp);
+    while(!feof(fp))
+    {
+        printf("%c",ch);
+        ch=fgetc(fp);               //Recursion
+    }
+    fclose(fp);
+}

Functions/areaofcircle.c

@@ -0,0 +1,17 @@
+#include<stdio.h>
+#define PI 3.14
+float areac(float);
+int main()
+{
+    float r;
+    printf("Enter the radius of Circle:\n");
+    scanf("%f",&r);
+    printf("The Area of the circle with radius %f is: %f",r,areac(r));
+    return 0;
+}
+float areac(float r)
+{
+    float z;
+    z=PI*r*r;
+    return z;
+}

Functions/dectobin.c

@@ -0,0 +1,23 @@
+#include<stdio.h>
+int dec(int);
+main()
+{
+    int x,i;
+    printf("Enter the value of x:\n");
+    scanf("%d",&x);
+    dec(x);
+}
+int dec(x)
+{
+    int i,bin[15];
+    for(i=0;i<15;i++)
+    {
+        bin[i]=x%2;
+        x=x/2;
+    }
+     printf("The Binary value is:\n");
+    for(i=14;i>=0;i--)
+    {
+         printf("%d",bin[i]);
+    }
+}

Functions/factorial.c

@@ -0,0 +1,20 @@
+#include<stdio.h>
+int fact(int x);
+int main()
+{
+    int x;
+    printf("Enter the value of x:\n");
+    scanf("%d",&x);
+    //z=fact(x);
+    printf("The factorial of x is :%d",fact(x));
+    return 0;
+}
+int fact(int x)
+{
+    int i,fact=1;
+    for(i=x;i>=1;i--)
+    {
+        fact*=i;
+    }
+    return fact;
+}

Functions/factors.c

@@ -0,0 +1,21 @@
+#include<stdio.h>
+void factors(int);
+main()
+{
+    int x;
+    printf("Enter the value of x:\n");
+    scanf("%d",&x);
+    factors(x);
+}
+void factors(int x)
+{
+    int i;
+    for(i=1;i<=x;i++)
+    {
+        if(x%i==0)
+        {
+            printf("%d",i);
+        }
+
+    }
+}

Functions/functions.c

@@ -0,0 +1,28 @@
+#include<stdio.h>
+void italy();
+void germany();
+void india();
+
+main()
+{
+    printf("I am in main.\n");
+    italy();
+    printf("I am back in main.\n");
+}
+void italy()
+{
+    printf("I am in  ITALY.\n");
+    germany();
+    printf("I am back in ITALY.\n");
+}
+void germany()
+{
+    printf("I am in GERMANY.\n");
+    india();
+    printf("I am back in GERMANY.\n");
+}
+void india()
+{
+    printf("I am in INDIA.\n");
+}
+

Functions/functions1.c

@@ -0,0 +1,17 @@
+#include<stdio.h>
+main()
+{
+    int sum(int x,int y);
+    int x,y,s;
+    printf("Enter x:\n");
+    scanf("%d",&x);
+    printf("Enter y:\n");
+    scanf("%d",&y);
+    s=sum(x,y);
+    printf("The sum is %d.\n",s);
+}
+sum(a,b)
+{
+    int z;
+    z=a+b;
+}

Functions/lcm.c

@@ -0,0 +1,29 @@
+#include<stdio.h>
+int lcm(int,int);
+main()
+{
+    int x,y;
+    printf("Enter the value of x:\n");
+    scanf("%d",&x);
+    printf("Enter the value of y:\n");
+    scanf("%d",&y);
+    if(x<y)
+    {
+        x=x+y;
+        y=x-y;
+        x=x-y;
+
+    }
+    printf("The lcm of x and y is %d.\n",lcm(x,y));
+}
+int lcm(int x,int y)
+{
+    int i;
+    for(i=x;;i++)
+    {
+        if(i%x==0&&i%y==0)
+        {
+            return i;
+        }
+    }
+}

Functions/multiply2values.c

@@ -0,0 +1,19 @@
+/*Use of functions*/
+#include<stdio.h>
+int sum(int,int);
+main()
+{
+    int x,y,a;
+    printf("Enter the value of x:\n");
+    scanf("%d",&x);
+    printf("Enter the value of y:\n");
+    scanf("%d",&y);
+    a=sum(x,y);
+    printf("The sum of x and y is %d.\n",a);
+}
+ int sum(int x,int y)
+{
+    int z;
+    z=x*y;
+    return z;
+}

Functions/oddoreven.c

@@ -0,0 +1,17 @@
+#include<stdio.h>
+int check(int);
+int main()
+{
+    int x;
+    printf("Enter the number:\n");
+    scanf("%d",&x);
+    return check(x);
+}
+int check(int x)
+{
+    int i;
+    if(x%2==0)
+        return 1;
+    else
+        return 0;
+}

Functions/primeornot.c

@@ -0,0 +1,24 @@
+#include<stdio.h>
+int prime(int);
+main()
+{
+    int x,z;
+    printf("Enter the value of x:\n");
+    scanf("%d",&x);
+    z=prime(x);
+    if(z==1)
+        printf("The number is not a prime number.\n");
+    else
+        printf("The number is a prime number.\n");
+}
+int prime(int x)
+{
+    int num;
+    for(int i=2;i<=x-1;i++)
+    {
+        if(x%i==0)
+            return 1;
+        else
+            return 0;
+    }
+}

Functions/printnaturalnos.c

@@ -0,0 +1,16 @@
+#include<stdio.h>
+int numbers(int);
+int main()
+{
+    int x;
+    printf("Enter the number upto which you want to print the numbers from 1:\n");
+    scanf("%d",&x);
+    numbers(x);
+    return 0;
+}
+int numbers(int x)
+{
+    int i;
+    for(i=1;i<=x;i++)
+        printf("%d\t",i);
+}

Functions/sumof2numbers.c

@@ -0,0 +1,20 @@
+/*Use of functions*/
+#include<stdio.h>
+main()
+{
+    float sum(float,float);
+    float x,y,a;
+    printf("Enter the value of x:\n");
+    scanf("%f",&x);
+    printf("Enter the value of y:\n");
+    scanf("%f",&y);
+     a=x+y;
+    a=sum(x,y);
+    printf("The sum of x and y is %f.\n",a);
+}
+float sum(float x,float y)
+{
+    float z;
+    z=x+y;
+    return z;
+}

Recursion/factorial.c

@@ -0,0 +1,19 @@
+#include<stdio.h>
+int sum(int);
+main()
+{
+   int x,z;
+   printf("Enter the value of x:\n");
+   scanf("%d",&x);
+   z=sum(x);
+   printf("The sum of %d numbers is %d.\n",x,z);
+}
+int sum(int a)
+{
+    int s;
+    if(a==1)
+        return(a);
+    s=a*sum(a-1);
+    return(s);
+}
+