PASS Week 13 Solutions

PASS WEEK 13 SOLUTIONS




PROBLEM #1

#include <stdio.h>
#include <stdlib.h>

int main(){

    int* ptr = NULL;
    int numElem;

    printf("Enter in number of elements: ");
    scanf("%d", &numElem);

    ptr = (int*)calloc(numElem, sizeof(int));

    for(int i = 0; i < numElem; i++)
    {
        scanf("%d", &ptr[i]);
    }

    for(int i = 0; i < numElem; i++)
    {
        printf("%d ", ptr[i]);
    }

    free(ptr);

    return 0;
}

















PROBLEM #2

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int* createArray(int);
void fillArray(int, int, int*);
void printArray(int, int*);

int main (int argc, char* argv[]) {

    int sz = atoi(argv[1]);
    int value = atoi(argv[2]);
    int* array = createArray(sz);
    fillArray(value, sz, array);
    printArray(sz, array);

    return(0);
}

int* createArray(int size){
    int* ary = (int*) calloc(size, sizeof(int));
    return ary;
}

void fillArray(int value, int size, int* ary){

    int startValue = value;
    for (int i = 0; i < size; i++){
        ary[i] = value;
        value += startValue;
    }

    return;
}

void printArray(int size, int* ary){
    for (int i = 0; i < size; i++){
        printf(" %d ", ary[i]);
    }
    printf("\n");
    return;
}








PROBLEM #3

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main () {

	char *str;

	/* Initial memory allocation */
	str = (char *) malloc(15);
	strcpy(str, "wordswordswords");
	printf("String = %s, Address = %s\n", str, str);

	/* Reallocating memory */
	str = (char *) realloc(str, 25);
	strcat(str, “, morewords");
	printf("String = %s, Address = %s\n", str, str);
	free(str);

	return(0);
}






PROBLEM #4

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void PrintArray(int, char**);
int main(void) {
 char* ary[5];
 char tmp[80];
 int strSz = 0;
 int i =0;
 printf("Enter in a series of 5 strings:");
 while(i < 5){
 fscanf(stdin, "%s", tmp);
 ary[i] = (char*) malloc(sizeof(tmp));
 strcpy(ary[i++],tmp);
 }
 PrintArray(i, ary);
 return 0;
}
void PrintArray(int sz, char** aryIn){
 int i = 0;
 for(i = 0; i < 5; i++){
 printf("The value is %s\n", aryIn[i]);
 }
 return;
}















PROBLEM #5

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int GetDimensions(int * , int * , char * );

int main(void) {
  char fName[80];
  int rows = 0;
  int cols = 0;
  printf("Enter the file name: ");
  scanf(" %s", fName);

  if (GetDimensions( & rows, & cols, fName)) {
    printf("The file has %d records and the largest is %d characters in length\n",
      rows, cols);
  } else {
    printf("The file could not be processed.\n");
  }

  return 0;
}
int GetDimensions(int * rows, int * max, char * fn) {
  FILE * fp = fopen(fn, "r");
  int cnt = 0;
  int tmp = 0;
  char buffer[1024];
  * max = 0;

  if (fp == NULL)
    return 0;
  else {
    while (fgets(buffer, 1024, fp) != NULL) {
      cnt++;
      tmp = strlen(buffer);
      if (tmp > * max) {
        * max = tmp;
      }
    }
    * rows = cnt;
    fclose(fp);
  }
  return 1;
}