C program to find the first occurrences of a character in a string; Through this tutorial, we will learn how to find the first occurrences of a character in a string using for loop, while loop, recursion, and functions in c programs.
Programs to Find First Occurrence of a Character in a String in C
Let’s use the following programs to find the first occurrences of a character in a string using for loop, while loop, recursion, and functions in c:
- C Program to Find First Occurrence of a Character in a String using For Loop
- C Program to Find First Occurrence of a Character in a String using While Loop
- C Program to Find First Occurrence of a Character in a String Using Recursion
- C Program to Find First Occurrence of a Character in a String using Function
C Program to Find First Occurrence of a Character in a String using For Loop
#include <string.h>
int main()
{
char s[1000],c;
int i,n,k=0;
printf("Enter the string : ");
gets(s);
printf("Enter character to be searched: ");
c=getchar();
for(i=0;s[i];i++)
{
if(s[i]==c)
{
k=1;
break;
}
}
if(k)
printf("character %c is first occurrence at location:%d ",c,i);
else
printf("character is not in the string ");
return 0;
}
The Output of the above c program; as follows:
Enter the string : hello programmer Enter character to be searched: e character e is first occurrence at location:1
C Program to Find First Occurrence of a Character in a String using While Loop
/* C Program to find First Occurrence of a Character in a String */
#include <stdio.h>
#include <string.h>
int main()
{
char str[100], ch;
int i, Flag;
i = Flag = 0;
printf("\n Please Enter any String : ");
gets(str);
printf("Enter character to be searched: ");
scanf("%c", &ch);
while(str[i] != '/* C Program to find First Occurrence of a Character in a String */
#include <stdio.h>
#include <string.h>
int main()
{
char str[100], ch;
int i, Flag;
i = Flag = 0;
printf("\n Please Enter any String : ");
gets(str);
printf("Enter character to be searched: ");
scanf("%c", &ch);
while(str[i] != '\0')
{
if(str[i] == ch)
{
Flag++;
break;
}
i++;
}
if(Flag == 0)
{
printf("character is not in the string ");
}
else
{
printf("character %c is first occurrence at location:%d ",ch,i);
}
return 0;
}
')
{
if(str[i] == ch)
{
Flag++;
break;
}
i++;
}
if(Flag == 0)
{
printf("character is not in the string ");
}
else
{
printf("character %c is first occurrence at location:%d ",ch,i);
}
return 0;
}
The Output of the above c program; as follows:
Please Enter any String : hello programer Enter character to be searched: e character e is first occurrence at location:1
C Program to Find First Occurrence of a Character in a String Using Recursion
#include <string.h>
int check(char *s,char c)
{
static int i;
if(!s[i])
{
return -1;
}
else
{
if(s[i]==c)
return i;
i++;
check(s,c);
}
}
int main()
{
char s[1000],c;
int n;
printf("Enter the string : ");
gets(s);
printf("Enter character to be searched: ");
c=getchar();
n=check(s,c);
if(n>-1)
printf("character %c is first occurrence at location:%d ",c,n);
else
printf("character is not in the string ");
return 0;
}
The Output of the above c program; as follows:
Enter the string : welcome to programming world Enter character to be searched: w character w is first occurrence at location:0
C Program to Find First Occurrence of a Character in a String using Function
#include <string.h>
int check(char *s,char c)
{
int i,k=0;
for(i=0;s[i];i++)
{
if(s[i]==c)
{
k=1;
break;
}
}
if(k)
return i;
else
return -1;
}
int main()
{
char s[1000],c;
int n;
printf("Enter the string : ");
gets(s);
printf("Enter character to be searched: ");
c=getchar();
n=check(s,c);
if(n>-1)
printf("character %c is first occurrence at location:%d ",c,n);
else
printf("character is not in the string ");
return 0;
}
The Output of the above c program; as follows:
Enter the string : Hello Enter character to be searched: o character o is first occurrence at location:4
