#include <stdio.h> void substr(char str1[], char str2[]); int palindrome(char str[]); int compare(char str1[], char str2[]); void copy(char str1[], char str2[]); void reverse(char str[]);int main(){ char str1[100], str2[100]; int result, option; do { printf("\n1.Substring Searching"); printf("\n2.Check for Palindrome"); printf("\n3.String Comparison"); printf("\n4.Copy string"); printf("\n5.Reverse String"); printf("\n6.Quit"); printf("\n\nEnter Your Choice:"); scanf("%d", &option);switch (option) { case 1: printf("\nEnter 1st string:"); scanf("%s",&str1); printf("\nEnter 2nd string:"); scanf("%s",&str2); substr(str1, str2); printf("\nPress a Character"); getch(); break;case 2: printf("\n Enter a String:"); scanf("%s",&str1); result = palindrome(str1); if (result == 0) printf("\nNot a palindrome"); else printf("\nA palindrome"); printf("\nPress a Character"); getch(); break; case 3: printf("\nEnter 1st string:"); scanf("%s",&str1); printf("\nEnter 2nd string:"); scanf("%s",&str2); result = compare(str1, str2); if (result == 0) printf("\nboth are same"); else if (result > 0) printf("\n1st>2nd"); else printf("\n1st<2nd"); printf("\nPress a Character"); getch(); break;case 4: printf("\nEnter a String:"); scanf("%s",&str1); copy(str2, str1); printf("\nResult=%s", str2); printf("\nPress a Character"); getch(); break; case 5: printf("\nEnter a String:");scanf("%s",&str1); reverse(str1); printf("\nResult=%s", str1); printf("\nPress a Character"); getch(); break; default: printf("\nInvalid Choice:"); break; } } while (option != 6); return 0; } void substr(char str1[], char str2[]) { int i, j, lena, lenb; for (lena = 0; str1[lena] != '\0'; lena++); for (lenb = 0; str2[lenb] != '\0'; lenb++); for (i = 0; i <= lena - lenb + 1; i++) { for (j = 0; str1[i + j] == str2[j] && str2[j] != '\0'; j++); if (str2[j] == '\0') printf("\nString found at location : %d", i + 1); } } int palindrome(char str[]) { int i, j; i = j = 0; while (str[j] != '\0') j++; while (i < j) { if (str[i] != str[j - 1]) return (0); i++; j--; } return (1); } int compare(char str1[], char str2[]) { int i; i = 0; while (str1[i] != '\0') { if (str1[i] > str2[i]) return (1); if (str1[i] < str2[i]) return (-1); i++; } return (0); } void copy(char str2[], char str1[]) { int i = 0; while (str1[i] != '\0') { str2[i] = str1[i]; i++; } str2[i] = '\0'; } void reverse(char str[]) { int i, j; char temp; i = j = 0; while (str[j] != '\0') j++; j--; while (i < j) { temp = str[i]; str[i] = str#include <stdio.h> void substr(char str1[], char str2[]); int palindrome(char str[]); int compare(char str1[], char str2[]); void copy(char str1[], char str2[]); void reverse(char str[]);int main(){ char str1[100], str2[100]; int result, option; do { printf("\n1.Substring Searching"); printf("\n2.Check for Palindrome"); printf("\n3.String Comparison"); printf("\n4.Copy string"); printf("\n5.Reverse String"); printf("\n6.Quit"); printf("\n\nEnter Your Choice:"); scanf("%d", &option);switch (option) { case 1: printf("\nEnter 1st string:"); scanf("%s",&str1); printf("\nEnter 2nd string:"); scanf("%s",&str2); substr(str1, str2); printf("\nPress a Character"); getch(); break;case 2: printf("\n Enter a String:"); scanf("%s",&str1); result = palindrome(str1); if (result == 0) printf("\nNot a palindrome"); else printf("\nA palindrome"); printf("\nPress a Character"); getch(); break; case 3: printf("\nEnter 1st string:"); scanf("%s",&str1); printf("\nEnter 2nd string:"); scanf("%s",&str2); result = compare(str1, str2); if (result == 0) printf("\nboth are same"); else if (result > 0) printf("\n1st>2nd"); else printf("\n1st<2nd"); printf("\nPress a Character"); getch(); break;case 4: printf("\nEnter a String:"); scanf("%s",&str1); copy(str2, str1); printf("\nResult=%s", str2); printf("\nPress a Character"); getch(); break; case 5: printf("\nEnter a String:");scanf("%s",&str1); reverse(str1); printf("\nResult=%s", str1); printf("\nPress a Character"); getch(); break; default: printf("\nInvalid Choice:"); break; } } while (option != 6); return 0; } void substr(char str1[], char str2[]) { int i, j, lena, lenb; for (lena = 0; str1[lena] != '\0'; lena++); for (lenb = 0; str2[lenb] != '\0'; lenb++); for (i = 0; i <= lena - lenb + 1; i++) { for (j = 0; str1[i + j] == str2[j] && str2[j] != '\0'; j++); if (str2[j] == '\0') printf("\nString found at location : %d", i + 1); } } int palindrome(char str[]) { int i, j; i = j = 0; while (str[j] != '\0') j++; while (i < j) { if (str[i] != str[j - 1]) return (0); i++; j--; } return (1); } int compare(char str1[], char str2[]) { int i; i = 0; while (str1[i] != '\0') { if (str1[i] > str2[i]) return (1); if (str1[i] < str2[i]) return (-1); i++; } return (0); } void copy(char str2[], char str1[]) { int i = 0; while (str1[i] != '\0') { str2[i] = str1[i]; i++; } str2[i] = '\0'; } void reverse(char str[]) { int i, j; char temp; i = j = 0; while (str[j] != '\0') j++; j--; while (i < j) { temp = str[i]; str[i] = str[j]; str[j] = temp; i++; j--; } } [j]; str[j] = temp; i++; j--; } } Write, Run & Share C Language code online using OneCompiler's C online compiler for free. It's one of the robust, feature-rich online compilers for C language, running the latest C version which is C18. Getting started with the OneCompiler's C editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose language as 'C' and start coding!
OneCompiler's C online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample C program which takes name as input and print your name with hello.
#include <stdio.h>
int main()
{
char name[50];
printf("Enter name:");
scanf("%s", name);
printf("Hello %s \n" , name );
return 0;
}
C language is one of the most popular general-purpose programming language developed by Dennis Ritchie at Bell laboratories for UNIX operating system. The initial release of C Language was in the year 1972. Most of the desktop operating systems are written in C Language.
When ever you want to perform a set of operations based on a condition if-else is used.
if(conditional-expression) {
// code
} else {
// code
}
You can also use if-else for nested Ifs and if-else-if ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to if-else-if ladder.
switch(conditional-expression) {
case value1:
// code
break; // optional
case value2:
// code
break; // optional
...
default:
// code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement){
// code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while(condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.
data-type array-name[size];
data-type array-name[size][size];
Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.
Two types of functions are present in C
Library functions are the in-built functions which are declared in header files like printf(),scanf(),puts(),gets() etc.,
User defined functions are the ones which are written by the programmer based on the requirement.
return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
//code
}