Learning to Program

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             Deen Dayal Upadhyaya Gorakhpur University                            Computer Science B.Sc2nd Practical 2016

Writing Data Into A File We can write data into a file. The following is the algorithm for writing data: Create a file using fopen() function Write data into a file using fprintf() and fputs() functions Close a file using fclose() function For testing, we create data into a file, demo.txt. For implementation, create a file, called filewrite.c, and write this code. #include <stdio.h> int main( int argc , const char* argv[]) { int i; FILE *f; f = fopen("demo.txt", "w+");   for (i= 0 ;i< 5 ;i++){    fprintf(f, "fprintf message %d\n",i);    fputs("fputs message\n", f); // no format } fclose(f); printf("Data was written into a file\n"); return 0 ; } Save this code. Compile and run this program.  

C program to add two matrix This c program add two matrices i.e. compute the sum of two matrices and then print it. Firstly user will be asked to enter the order of matrix (number of rows and columns) and then two matrices. For example if the user entered order as 2, 2 i.e. two rows and two columns and matrices as First Matrix :- 1 2 3 4 Second matrix :- 4 5 6 7 then output of the program (sum of First and Second matrix) will be 5  7 9 11 #include <stdio.h>   int main ( ) { int m , n , c , d , first [ 10 ] [ 10 ] , second [ 10 ] [ 10 ] , sum [ 10 ] [ 10 ] ;   printf ( "Enter the number of rows and columns of matrix \n " ) ; scanf ( "%d%d" , & m , & n ) ; printf ( "Enter the elements of first matrix \n " ) ;   for ( c = 0 ; c < m ; c ++ ) for ( d = 0 ; d < n ; d ++ ) scanf ( "%d" , & first [ c ] [ d ] ) ;   printf (...

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