CODETALK

#include<stdio.h> main() { int arr[100][100],arr1[100][3],i,j,m,n,a=1,b=0; printf("enter the no of columns and rows\n"); scanf("%d%d",&m,&n); arr1[0][0]=m;arr1[0][1]=n; printf("enter the elements of the matrix\n"); for(i=0;i<m;i++) for(j=0;j<n;j++) { scanf("%d",&arr[i][j]); if(arr[i][j]!=0) { arr1[a][b]=i; arr1[a][b+1]=j; arr1[a][b+2]=arr[i][j]; a++; } } arr1[0][2]=a-1; printf("the sparse matrix is as follows\n"); for(i=0;i<a;i++){ for(j=0;j<3;j++) printf("%d\t",arr1[i][j]); printf("\n");} }

#include<stdio.h> main() { int i,n,arr[100],a=0,b=0; printf("enter the no of elements in the array\n"); scanf("%d",&n); printf("enter the elements of the array\n"); for(i=0;i<n;i++) scanf("%d",&arr[i]); for(i=1;i<n;i++) if(arr[a]<arr[i]) { b=arr[a]; a=i; } else if(b<arr[i]) b=arr[i]; printf("\n the second largest number is %d ",b); }

#define f(x) (x)*log10(x)-1.2 #include<stdio.h> # include<math.h>  main() { float i,a,b,c,t=0; for(i=0;;i++) { if(f(i)>0&&f(i+1)<0) { a=i;b=i+1;break;} if((f(i)<0)&&(f(i+1)>0)) { a=i+1;b=i;break;} } for(i=0;;i++) { c=(a+b)/2; if(f(c)>0) a=c; else b=c; if(fabs(c-t)<=.00005) break; t=c; } printf("\nthe root is %f",c); }