i got provided the source code can you help me to check?

#include <iostream> #include <fstream> using namespace std; int main() { // declaring array variables a, b to hold input matrices // declaring array variable mult to hold the result matrix multiplication int a[100][100], b[100][100], mult[100][100]; // declaring variables r1, c1 to hold the dimensions of matrix a // declaring variables r2, c2 to hold the dimensions of matrix b int r1, c1, r2, c2; // creating an instance of ifstream class to read data from file ifstream infile; // open matrix.dat file to read data of matrices a and b infile.open("matrix.dat"); /* check if matrix.dat file is opened correctly or not if there any error while opening file, report the information to user and stop execution of program */ if (!infile) { cout << " Cannot open the input file."; return 0; } // read the dimensions of matrix a from file infile >> r1 >> c1 ; // read r1 x c1 matrix data from file and store it into array a for(int i = 0; i < r1; i++) for(int j = 0; j < c1; j++) infile >> a[i][j]; // display data of matrix a read from file cout << endl << " Data of Matrix A is: " << endl; for(int i = 0; i < r1; ++i) { for(int j = 0; j < c1; ++j) cout << "\t" << a[i][j]; cout << endl; } // read the dimensions of matrix b from file infile >> r2 >> c2 ; // read r2 x c2 matrix data from file and store it into array b for(int i = 0; i < r2; i++) for(int j = 0; j < c2; j++) infile >> b[i][j]; // display data of matrix b read from file cout << endl << " Data of Matrix B is: " << endl; for(int i = 0; i < r2; i++) { for(int j = 0; j < c2; j++) cout << "\t" << b[i][j]; cout << endl; } /* checking whether multiplication of the matrix can be done If number of columns (c1) of matrix a in not equal to number of rows (r2) of matrix b, then then multiplication of matrix cannot be done */ if (c1 != r2) { cout << " Error! Matrix Multiplication cannot performed"; return 0; } // continuing with matrix multiplication // Initializing elements of matrix mult to 0. for(int i = 0; i < r1; i++) for(int j = 0; j < c2; j++) mult[i][j] = 0; // Multiplying matrix a and b and storing in array mult. for(int i = 0; i < r1; i++) for(int j = 0; j < c2; j++) for(int k = 0; k < c1; k++) mult[i][j] += a[i][k] * b[k][j]; // Displaying the result of matrix multiplication cout << endl << " The result of Matrix Multiplication is : " << endl; for(int i = 0; i < r1; i++) { for(int j = 0; j < c2; j++) cout << "\t" << mult[i][j]; cout << endl; } // writing result of matrix multiplication into matrix.res file // creating an instance of ofstream class to write data into file ofstream outfile; // open matrix.res file to write data of matrix mult into file outfile.open("matrix.res"); /* check if matrix.res file is opened correctly or not if there any error while opening file, report the information to user and stop execution of program */ if (!outfile) { cout << " Cannot open the output file."; return 0; } // otherwise, write mult matrix data into file for(int i = 0; i < r1; i++) { for(int j = 0; j < c2; j++) outfile << mult[i][j] << " "; outfile << "\n"; } return 0; }

i got provided the source code can you help me to check?

Write a complete C++ program which can multiply three matrices. Your program need to read matrix A , Matrix B, and Matrix C from data file. The size of all the matrices must be at least 3 x 3 Your program must also store the result into result file.

Any 3d artists here

Does people use header guards for function prototypes in header files ? The example I have seen used header guard where they used function definition in the header file to not violate the one definition rule.. How would it affect if I do without header guards ?

I am running into a segmentation fault while trying to increase the size of the array

I am running into a segmentation fault while trying to increase the size of the array

nvm multiple declarations arising cuz of not using header guard doesn't affect how the program works... I have tested it now.

If the header only contains function prototype, I think header guards can be removed safely... Maybe By the way, what does "nvm" mean?

If the header only contains function prototype, I think header guards can be removed safely... Maybe By the way, what does "nvm" mean?

nevermind

Write an algorithm that takes a number and determines whether it is narcissistic. It is a narcissistic number whose sum of digits is equal to the number of digits. For example, 153 is a narcissistic number 1 ^ 3 + 5 ^ 3 + 3 ^ 3 = 1 + 125 + 27 = 153 But 1652 is not fascinated 1 ^ 4 + 6 ^ 4 + 5 ^ 4 + 2 ^ 4 = 1 + 1296 + 625 + 16 = 1938

And at the end use if to check if sum==no. Or not if yes print the desire output

Noob asks. In C, can I loop through an array using a list slicing like in python, array[1:5] for example? >>> array = ['a', 'b', 'c', 'd', 'e', 'f'] >>> array [1:5] ['b', 'c', 'd', 'e'] >>> array [1:5:2] ['b', 'd']

Noob asks. In C, can I loop through an array using a list slicing like in python, array[1:5] for example? >>> array = ['a', 'b', 'c', 'd', 'e', 'f'] >>> array [1:5] ['b', 'c', 'd', 'e'] >>> array [1:5:2] ['b', 'd']

C/C++?

In this u use while loop to calculate it

And at the end use if to check if sum==no. Or not if yes print the desire output

#include <stdio.h> int main() { char i[] = "153"; int n = sizeof i / sizeof char; int sum = 0; for (int i = 0; i < n; i++) sum += a[i] ** n; if (sum == n) printf("%s", "Desire output"); return 0; } Like this?

Size of "i" is 3 bytes, and size of int is 4 bytes

i want to learn c programming from basic

Write a program that reads the names and average marks of 40 students and assign each of them a grade and then output In a suitable format.

How do you create this program using c++

It's simple... by typing.

Iterate over the input, for each student do if-else-if on the score, push it into a vector After the loop output the data from the vector iterating over it

😂I know it's typing am asking how do you go about it... The syntax or what conditions should I use to have all the details in the program

Iterate over the input, for each student do if-else-if on the score, push it into a vector After the loop output the data from the vector iterating over it

Could you kindly send a sample.. 😢Can't seem to get any of this... But I had done it with switch statement the vector part is what am not getting

Or output as you're processing the data

Can you show the code (you can use ideone or pastebin to paste it here). About the vector, you probably need to declare a struct with the data you need to output. E.g. std::string for name and std::string or char for the grade. Create a vector of these structs, push to it when you decide a mark, then iterate over it to output the data. If you don't know how to use std::vector just Google it, there are a lot of tutorials

It is just a simple if statement if (Average>80) grade A if (Average>70 && Average<=80) grade B... it is not so complex

Well, if the input is given line by line, then the input and output will be mixed. If that is OK, then sure, the vector is not needed.

while loop? not for loop?

Write an algorithm that takes a number and determines whether it is narcissistic. It is a narcissistic number whose acquisition of digits is equal to the ability of the number of digits against the number itself. For example, 153 is a narcissistic number 1 ^ 3 + 5 ^ 3 + 3 ^ 3 = 1 + 125 + 27 = 153 But 1652 is not fascinated 1 ^ 4 + 6 ^ 4 + 5 ^ 4 + 2 ^ 4 = 1 + 1296 + 625 + 16 = 1938 Please answer🙏❤️

Search for "Armstrong Number" in Google

Write an algorithm that takes a number and determines whether it is narcissistic. It is a narcissistic number whose acquisition of digits is equal to the ability of the number of digits against the number itself. For example, 153 is a narcissistic number 1 ^ 3 + 5 ^ 3 + 3 ^ 3 = 1 + 125 + 27 = 153 But 1652 is not fascinated 1 ^ 4 + 6 ^ 4 + 5 ^ 4 + 2 ^ 4 = 1 + 1296 + 625 + 16 = 1938 Please answer🙏❤️