1. Подсчитать среднее арифметическое чисел из последовательности.
#include <stdio.h>
#define NO_ERROR 0
#define EMPTY_FILE -1
#define INCORRECT_DATA -2
int err;
double mean(FILE * f);
int main(int argc, char ** argv)
{
err = NO_ERROR;
double result;
FILE * f;
if (argc!= 2)
{
if (argc == 1)
{
printf("No input file\n");
}
else if (argc > 2)
{
printf("Too many parametres\n");
}
return -1;
}
f = fopen(argv[1], "r");
if (f == NULL)
{
printf("File does not exist\n");
return -1;
}
result = mean(f);
if (err!= NO_ERROR)
{
printf("Error with code %d occured, program stopped\n", err);
return -1;
}
printf("Correctly finished, the result is %lf\n", result);
return NO_ERROR;
}
double mean(FILE * f)
{
int r;
double temp;
int n = 0;
double s = 0;
while (!feof(f))
{
r = fscanf(f, "%lf", &temp);
if (r == 1)
{
s += temp;
++n;
}
else if (r == 0)
{
err = INCORRECT_DATA;
return -1;
}
}
if (n == 0)
{
err = EMPTY_FILE;
return 0;
}
return s / n;
}
2. Подсчитать среднее геометрическое чисел из последовательности.
#include <stdio.h>
#include <math.h>
#define NO_ERROR 0
#define EMPTY_FILE -1
#define INCORRECT_DATA -2
#define NEGATIVE_NUMBER -3
int err;
double geom(FILE * f);
int main(int argc, char ** argv)
{
err = NO_ERROR;
double result;
FILE * f;
if (argc!= 2)
{
if (argc == 1)
{
printf("No input file\n");
}
else if (argc > 2)
{
printf("Too many parametres\n");
}
return -1;
}
f = fopen(argv[1], "r");
if (f == NULL)
{
printf("File does not exist\n");
return -1;
}
result = geom(f);
if (err!= NO_ERROR)
{
printf("Error with code %d occured, program stopped\n", err);
return -1;
}
printf("Correctly finished, the result is %lf\n", result);
return NO_ERROR;
}
double geom(FILE * f)
{
int r;
double temp;
int n = 0;
double s = 1;
while (!feof(f))
{
r = fscanf(f, "%lf", &temp);
if (r == 1)
{
if (temp < 0)
{
err = NEGATIVE_NUMBER;
return -1;
}
s *= temp;
++n;
}
else if (r == 0)
{
err = INCORRECT_DATA;
return -1;
}
}
if (n == 0)
{
err = EMPTY_FILE;
return 0;
}
return pow(s, 1.0 / n);
}
3. Подсчитать среднее гармоническое чисел из последовательности.
#include <stdio.h>
#define NO_ERROR 0
#define EMPTY_FILE -1
#define INCORRECT_DATA -2
#define NON_POSITIVE_NUMBER -3
int err;
double harm(FILE * f);
int main(int argc, char ** argv)
{
err = NO_ERROR;
double result;
FILE * f;
if (argc!= 2)
{
if (argc == 1)
{
printf("No input file\n");
}
else if (argc > 2)
{
printf("Too many parametres\n");
}
return -1;
}
f = fopen(argv[1], "r");
if (f == NULL)
{
printf("File does not exist\n");
return -1;
}
result = harm(f);
if (err!= NO_ERROR)
{
printf("Error with code %d occured, program stopped\n", err);
return -1;
}
printf("Correctly finished, the result is %lf\n", result);
return NO_ERROR;
}
double harm(FILE * f)
{
int r;
double temp;
int n = 0;
double s = 0;
while (!feof(f))
{
r = fscanf(f, "%lf", &temp);
if (r == 1)
{
if (temp > 0)
{
s += 1 / temp;
++n;
}
else
{
err = NON_POSITIVE_NUMBER;
return -1;
}
}
else if (r == 0)
{
err = INCORRECT_DATA;
return -1;
}
}
if (n == 0)
{
err = EMPTY_FILE;
return 0;
}
return n / s;
}
4. Подсчитать количество чисел, больших предыдущего.
#include <stdio.h>
#define NO_ERROR 0
#define EMPTY_FILE -1
#define INCORRECT_DATA -2
int err;
int grow(FILE * f);
int main(int argc, char ** argv)
{
err = NO_ERROR;
int result;
FILE * f;
if (argc!= 2)
{
if (argc == 1)
{
printf("No input file\n");
}
else if (argc > 2)
{
printf("Too many parametres\n");
}
return -1;
}
f = fopen(argv[1], "r");
if (f == NULL)
{
printf("File does not exist\n");
return -1;
}
result = grow(f);
if (err!= NO_ERROR)
{
printf("Error with code %d occured, program stopped\n", err);
return -1;
}
printf("Correctly finished, the result is %d\n", result);
return NO_ERROR;
}
int grow(FILE * f)
{
int r;
double temp_1, temp_2;
int result = 0;
int n = 0;
r = fscanf(f, "%lf", &temp_1);
if (r == 1)
{
++n;
}
else if (r == 0)
{
err = INCORRECT_DATA;
return -1;
}
while (!feof(f))
{
temp_2 = temp_1;
r = fscanf(f, "%lf", &temp_1);
if (r == 1)
{
if (temp_1 > temp_2)
++result;
++n;
}
else if (r == 0)
{
err = INCORRECT_DATA;
return -1;
}
}
if (n == 0)
{
err = EMPTY_FILE;
return 0;
}
return result;
}
5. Определить есть ли в последовательности число X (для вещественных чисел — с точностью ε).
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define NO_ERROR 0
#define EMPTY_FILE -1
#define INCORRECT_DATA -2
int err;
double X;
const double epsilon = 1.0e-15;
int cont(FILE * f);
int main(int argc, char ** argv)
{
err = NO_ERROR;
int result;
FILE * f;
char * end_ptr;
if (argc!= 3)
{
if (argc == 1)
{
printf("No input file\n");
}
else if (argc == 2)
{
printf("No standard number\n");
}
else if (argc > 3)
{
printf("Too many parametres\n");
}
return -1;
}
X = strtod(argv[2], &end_ptr);
if (*end_ptr)
{
printf("Incorrect standarrd number\n");
return -1;
}
f = fopen(argv[1], "r");
if (f == NULL)
{
printf("File does not exist\n");
return -1;
}
result = cont(f);
if (err!= NO_ERROR)
{
printf("Error with code %d occured, program stopped\n", err);
return -1;
}
if (result == 1)
printf("Correctly finished, row contains %lf\n", X);
else
printf("Correctly finished, row does not contain %lf\n", X);
return NO_ERROR;
}
int cont(FILE * f)
{
double temp;
int r;
int n = 0;
while (!feof(f))
{
r = fscanf(f, "%lf", &temp);
if (r == 1)
{
if (fabs(temp - X) < epsilon)
return 1;
++n;
}
else if (r == 0)
{
err = INCORRECT_DATA;
return -1;
}
}
if (n == 0)
{
err = EMPTY_FILE;
return -1;
}
return 0;
}
6. Определить номер последнего числа, равного X (для вещественных чисел — с точностью ε).
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define NO_ERROR 0
#define EMPTY_FILE -1
#define INCORRECT_DATA -2
int err;
double X;
const double epsilon = 1.0e-15;
int last(FILE * f);
int main(int argc, char ** argv)
{
err = NO_ERROR;
int result;
FILE * f;
char * end_ptr;
if (argc!= 3)
{
if (argc == 1)
{
printf("No input file\n");
}
else if (argc == 2)
{
printf("No standard number\n");
}
else if (argc > 3)
{
printf("Too many parametres\n");
}
return -1;
}
X = strtod(argv[2], &end_ptr);
if (*end_ptr)
{
printf("Incorrect standard number\n");
return -1;
}
f = fopen(argv[1], "r");
if (f == NULL)
{
printf("File does not exist\n");
return -1;
}
result = last(f);
if (err!= NO_ERROR)
{
printf("Error with code %d occured, program stopped\n", err);
return -1;
}
if (result == -1)
printf("Correctly finished, there are no elements equal to %lf\n", X);
else
printf("Correctly finished, last element equal to %lf has number %d\n", X, result);
return NO_ERROR;
}
int last(FILE * f)
{
double temp;
int r;
int n = 0;
int result = -1;
while (!feof(f))
{
r = fscanf(f, "%lf", &temp);
if (r == 1)
{
if (fabs(temp - X) < epsilon)
result = n;
++n;
}
else if (r == 0)
{
err = INCORRECT_DATA;
return -1;
}
}
if (n == 0)
{
err = EMPTY_FILE;
return -1;
}
return result;
}
7. Определить все ли элементы последовательности равны между собой (для вещественных чисел — с точностью ε).
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define NO_ERROR 0
#define EMPTY_FILE -1
#define INCORRECT_DATA -2
int err;
const double epsilon = 1.0e-15;
int stat(FILE * f);
int main(int argc, char ** argv)
{
err = NO_ERROR;
int result;
FILE * f;
char * end_ptr;
if (argc!= 2)
{
if (argc == 1)
{
printf("No input file\n");
}
else if (argc > 2)
{
printf("Too many parametres\n");
}
return -1;
}
f = fopen(argv[1], "r");
if (f == NULL)
{
printf("File does not exist\n");
return -1;
}
result = stat(f);
if (err!= NO_ERROR)
{
printf("Error with code %d occured, program stopped\n", err);
return -1;
}
if (result == 1)
printf("Correctly finished, all elements are equal\n");
else
printf("Correctly finished, there are some different elements\n");
return NO_ERROR;
}
int stat(FILE * f)
{
double temp;
double first;
int r;
int n = 0;
r = fscanf(f, "%lf", &first);
if (r == 1)
{
++n;
}
else if (r == 0)
{
err = EMPTY_FILE;
return -1;
}
while (!feof(f))
{
r = fscanf(f, "%lf", &temp);
if (r == 1)
{
if (fabs(temp - first) > epsilon)
return 0;
++n;
}
else if (r == 0)
{
err = INCORRECT_DATA;
return -1;
}
}
if (n == 0)
{
err = EMPTY_FILE;
return -1;
}
return 1;
}
8. Определить является ли последовательность возрастающей, убывающей?
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define NO_ERROR 0
#define EMPTY_FILE -1
#define INCORRECT_DATA -2
int err;
const double epsilon = 1.0e-15;
int stat(FILE * f);
int main(int argc, char ** argv)
{
err = NO_ERROR;
int result;
FILE * f;
char * end_ptr;
if (argc!= 2)
{
if (argc == 1)
{
printf("No input file\n");
}
else if (argc > 2)
{
printf("Too many parametres\n");
}
return -1;
}
f = fopen(argv[1], "r");
if (f == NULL)
{
printf("File does not exist\n");
return -1;
}
result = stat(f);
if (err!= NO_ERROR)
{
printf("Error with code %d occured, program stopped\n", err);
return -1;
}
if (result == 1)
printf("Correctly finished, all elements are equal\n");
else
printf("Correctly finished, there are some different elements\n");
return NO_ERROR;
}
int stat(FILE * f)
{
double temp;
double first;
int r;
int n = 0;
r = fscanf(f, "%lf", &first);
if (r == 1)
{
++n;
}
else if (r == 0)
{
err = EMPTY_FILE;
return -1;
}
while (!feof(f))
{
r = fscanf(f, "%lf", &temp);
if (r == 1)
{
if (fabs(temp - first) > epsilon)
return 0;
++n;
}
else if (r == 0)
{
err = INCORRECT_DATA;
return -1;
}
}
if (n == 0)
{
err = EMPTY_FILE;
return -1;
}
return 1;
}
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