
THIS IS THE PROGRAM FOR STEP 3:
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>
int main(int argc, char *argv[]){
int row = 0;
int column = 0;
row = atoi(argv[1]);
column = atoi(argv[2]);
int *A = (int *) malloc((row * column) * sizeof(int));
int i, j;
printf("Enter the matrix elements:\n");
for (i = 0; i < row; i++) {
for (j = 0; j < column; j++) {
printf("A[%d,%d] = ", i, j);
scanf("%d", A + i * column + j);//matrix elements is stored in row-wise
}
printf("\n");
}
int n = 0;
printf("Enter a number:");
scanf("%d", &n);
for(int i = 0; i < row; ++i){
pid_t pid = fork();
if (pid == -1){//not able to create child
printf("parent PID %d => \n", getpid());
for (j = 0; j < column; j++) {
*(A + i * column + j) = n * (*(A + i * column + j));
printf("%d * A[%d,%d] = %d\n", n, i, j, *(A + i * column + j));
}
}
else if (pid == 0) {//child
printf("child%d PID: %d \n", i, getpid());
for (j = 0; j < column; j++) {
*(A + i * column + j) = n * (*(A + i * column + j));
printf("%d * A[%d,%d] = %d\n", n, i, j, *(A + i * column + j));
}
exit(0);
}
}
wait(0);
printf("Final matrix elements:\n");
for (i = 0; i < row; i++) {
for (j = 0; j < column; j++) {
printf("A[%d,%d] = %d\n", i, j, *(A + i * column + j));
}
printf("\n");
}
exit(0);
}


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