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Simple calculator Quadratic equation Electricty Bill Binary Search on Integers / Names Matrix multiplication Taylor series Bubble sort.  string operations such as compare, concatenate, string length.  above and below the average   pointers  Binary to Decimal Conversion. engineering computer all programs 1sem 2022

STRINGconcatenation #include<stdio.h> #include<stdlib.h> int length (char str[]); int compare (char str1[],char str2[]); void concatenate (char str1[],char str2[]); void main() { char str1[30],str2[30]; int choice,a,i,j; printf("enter 1-string comparision\n"); printf("enter 2-string length\n"); printf("enter 3-string concatenation\n"); printf("enter 4-exit\n"); scanf("%d",&choice); switch(choice) { case 1:printf("enter string 1\n"); scanf("%s",str1); printf("enter string 2\n"); scanf("%s",str2); a=compare(str1,str2); if(a==0) { printf("%s and%s are identical\n",str1,str2); } else { printf("%s and%s are not identical\n",str1,str2); } break; case 2:pr...

Taylorseries #include<stdio.h> #include<stdlib.h> #include<math.h> int main() {  int ch,i;  float num,den,x,degree,sum=0,term;  printf("enter 1 for sin(x)\n enter 2 for cos(x)\n");  scanf("%d",&ch);  printf("enter the degree\n");  scanf("%f",&degree);  x=(degree*3.14)/180.0;  switch(ch) {   case 1:num=x;   den=1;   i=2; break;   case 2:num=1;   den=1;   i=1;   break;   default:printf("enter the proper choice\n");   exit(0); }   do {   term=num/den;   num=-num*x*x;   den=den*i*(i+1);   sum=sum+term;   i=i+2; } while(fabs(term)>0.000001);   if(ch==1) {   printf("sin(%f)without using built in function=%f\n",degree,sum);   printf("sin(%f)with using built in function=%f\n",degree,sin(x)); } else {  printf("cos(%f) without using built i...

BinarySearch #include<stdio.h> #include<stdlib.h> #include<string.h> void main() { int a[20],low,mid,high,i,n,k,ch; char b[20][20],key[20]; printf("1. binary search for integer\n2. Binary search for string/name\n"); printf("Enter your choice:\t"); scanf("%d",&ch); switch(ch) { case 1: /* For integers */              printf("Enter the number of elements  in ascending order  \n");              scanf("%d",&n);                          printf("Enter the elements\n");              for(i = 0 ; i < n ; i++)                   ...

simple calculater #include<stdio.h> #include<stdlib.h> void main() { float a,b,c; char op; printf("enter the two operands\n"); scanf("%f%f",&a,&b); printf("enter an operator\n"); scanf(" %c",&op); switch (op) { case '+': c=a+b; printf("%f+%f=%f\n",a,b,c); break; case '-': c=a-b; printf("%f-%f=%f\n",a,b,c); break; case '*': c=a*b; printf("%f*%f=%f\n",a,b,c); break; case '/': if(b!=0) { c=a/b; printf("%f/%f=%f\n",a,b,c); exit(0); } else printf("division by 0 error"); break; default: printf("enter valid operation"); } } simple calculater Start  Read 2 numbers as a and b Read operator (+ or – or * or /) as op If op is + then di...

Structures abov below avg #include<stdio.h> struct student { char name [100]; char usn [20]; float marks; }; void main() { int i,j,k,m,n,aboveavg[100],belowavg[100]; float total=0.0,avg=0.0; struct student s[100]; printf("enter number of students\n"); scanf("%d",&n); for(i=0;i<n;i++) { printf("enter the details of students%d\n",i+1); printf("enter name\n"); scanf("%s",s[i].name); printf("enter usn\n"); scanf("%s",s[i].usn); printf("enter marks\n"); scanf("%f",&s[i].marks); total+=s[i].marks; } printf("enter the details of students\n"); printf("name\t\t usn\t\t marks\n"); for(i=0;i<n;i++) printf("%s\t\t %s\t\t %f\n",s[i].name,s[i].usn,s[i].marks); avg=total/n; printf("avg=%f\n",avg); j=0; k=0; for(i=0;i<n;i++) { if(s[i].marks>avg) aboveavg[j++]=i; else belowavg[k++]=i; } printf(...

Quadratic Equation #include<stdio.h> #include<stdlib.h> #include<math.h> void main() {  float a,b,c,x1,x2,rp,ip,disc;  printf("enter the co-efficients\n");  scanf("%f%f%f",&a,&b,&c);  if((a*b*c)==0)  {  printf("a cannot be zero");  exit(0);  }  disc=b*b-4*a*c;  if(disc==0) {  printf("the roots are equal\n"); x1=x2=-b/(2*a);  printf("x1=%f\n x2=%f\n",x1,x2); }  else if(disc>0) {  x1=(-b+sqrt(disc))/(2*a);  x2=(-b-sqrt(disc))/(2*a);  printf("the roots are real and distinct\n");  printf("x1=%f\n x2=%f\n",x1,x2); } else  {  rp=-b/(2*a);  ip=sqrt(fabs(disc))/(2*a);  printf("the roots are Complex\n");  printf("first root=%f+i%f\n",rp,ip);  printf("second root=%f-i%f\n",rp,ip); } } Quadratic Equation Start Read the co-efficient as a, b...