C Programming Code Examples
C > Strings Code Examples
Input a String with atleast one Number, Print the Square of all the Numbers in a String
/* Input a String with atleast one Number, Print the Square of all the Numbers in a String */
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
struct detail
{
int number;
int square;
};
int update(struct detail [], int, int);
int toint(char []);
int main()
{
struct detail s[10];
char unit[20], string[100];
char c;
int num, x, j = 0, count = 0;
printf("Enter string: ");
x = 0;
do
{
fflush(stdin);
c = getchar();
string[x++] = c;
} while (c != '\n');
string[x - 1] = '\0';
printf("The string entered is: %s\n", string);
for (x = 0; x < strlen(string); x++)
{
while (x < strlen(string) && !isspace(string[x]))
{
unit[j++] = string[x++];
}
if (j != 0)
{
unit[j] = '\0';
num = toint(unit);
count = update(s, num, count);
j = 0;
}
}
printf("*****************\nNumber\tSquare\n*****************\n");
for (x = 0; x < count; x++)
{
printf("%d\t %d\n", s[x].number, s[x].square);
}
return 0;
}
int update(struct detail s[], int num, int count)
{
s[count].number = num;
s[count].square = num * num;
return (count + 1);
}
int toint(char str[])
{
int len = strlen(str);
int x, num = 0;
for (x = 0; x < len; x++)
{
num = num + ((str[len - (x + 1)] - '0') * pow(10, x));
}
return num;
}
C supports nesting of loops in C. Nesting of loops is the feature in C that allows the looping of statements inside another loop. Any number of loops can be defined inside another loop, i.e., there is no restriction for defining any number of loops. The nesting level can be defined at n times. You can define any type of loop inside another loop; for example, you can define 'while' loop inside a 'for' loop.
Writes the C string pointed by format to the standard output (stdout). If format includes format specifiers (subsequences beginning with %), the additional arguments following format are formatted and inserted in the resulting string replacing their respective specifiers. printf format string refers to a control parameter used by a class of functions in the input/output libraries of C programming language. The string is written in a simple template language: characters are usually copied literally into the function's output, but format specifiers, which start with a % character, indicate the location and method to translate a piece of data (such as a number) to characters. "printf" is the name of one of the main C output functions, and stands for "print formatted". printf format strings are complementary to scanf format strings, which provide formatted input (parsing). In both cases these provide simple functionality and fixed format compared to more sophisticated and flexible template engines or parsers,
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