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c programming examples


1.
main()    
   {
         
   }
========================
2.
void main()    
   {
         
   }
========================
3.
int main() 
   {
     
   return 0;    
   }
========================
4.
int main ()
     {
     printf ("Welcome to C language");
     return 0;
     }
========================
5.
 #include  <stdio.h>
 #include  <conio.h>
 int main ()
     {
     clrscr(); 
     printf (“Welcome to C language”);
     return 0;                       
     }
========================
6.
 #include  <stdio.h>
 #include  <conio.h>
 int main ()
     {
     clrscr();
     printf (“Welcome to C language”);
     getch();
     retun 0;                    
     }
========================
String: strlen()
 #include  <stdio.h>
 #include  <conio.h>
int main()
{   
    char str[30]="C PROGRAMMING";             
    clrscr();
    printf("\n\nstr : %s\n\n",str);
    printf("\nLength of the string, strlen(str) is %d\n",strlen(str));
    getch();
    return 0;
}
========================
String: strlwr()
 #include  <stdio.h>
 #include  <conio.h>
int main()
{   
    char str[30]="C PROGRAMMING";           
    clrscr();
    printf("\n\nstr : %s\n\n",str);
    printf("strlwr(str) : %s\n",strlwr(str));
    getch();
    return 0;
}
========================
String: strupr()
 #include  <stdio.h>
 #include  <conio.h>
int main()
{   
    char str[30]="C Programming";           
    clrscr();
    printf("\n\nstr : %s\n\n",str);
    printf("strupr(str) : %s\n",strupr(str));
    getch();   
    return 0;
}
========================
String: strcat()
 #include  <stdio.h>
 #include  <conio.h>
int main()
{   
    char str1[25]="I LIKE ";
    char str2[15]="C PROGRAMMIG";         
    clrscr();
    printf("\n\nstr1 : %s\t\t\tstr2 : %s\n\n",str1,str2);
    printf("\n\nstrcat(str1,str2) : %s\n\n",strcat(str1,str2));
    printf("\n\nstr1 : %s\t\tstr2 : %s\n\n",str1,str2);
    getch();
    return 0;
}
========================
String: strncat()
 #include  <stdio.h>
 #include  <conio.h>
int main()
{   
    char str1[25]="I LIKE ";
    char str2[13]="C PROGRAMMIG";         
    clrscr();
    printf("\n\nBEFORE:\n\nstr1 : %s\t\t\tstr2 : %s\n\n",str1,str2);
    printf("\n\nstrncat(str1,str2,5) : %s\n\n",strncat(str1,str2,5));
    printf("\n\nAFTER:\n\nstr1 : %s\t\tstr2 : %s\n\n",str1,str2);
    getch();
    return 0;
}
========================
String: strcpy()
 #include  <stdio.h>
 #include  <conio.h>
int  main()
{
    char str1[15]="I LIKE ";
    char str2[15]="C PROGRAMMIG";
    clrscr();
    printf("\n\nBEFORE:\n\nstr1 : %s\t\t\tstr2 : %s\n\n",str1,str2);
    strcpy(str1,str2);
    printf("\n\nAFTER:\n\nstr1 : %s\t\tstr2 : %s\n\n",str1,str2);
    getch();
    return 0;
}
========================
String: strncpy()
 #include  <stdio.h>
 #include  <conio.h>
int  main()
{
    char str1[25]="I LIKE ";
    char str2[15]="C PROGRAMMIG";
    clrscr();
    printf("\n\nBEFORE:\n\nstr1 : %s\t\t\tstr2 : %s\n\n",str1,str2);
    strncpy(str1,str2,4);
    printf("\n\nAFTER:\n\nstr1 : %s\t\tstr2 : %s\n\n",str1,str2);
    getch();
    return 0;
}

    

========================
String: strcmp()
 #include  <stdio.h>
 #include  <conio.h>
int main()
{   
    char str1[]="I LIKE"; 
    char str2[]="C Expert"; 
    int i;        
    clrscr();
    i=strcmp(str1,str2);
    if(i==0)       
        printf("\n\nstr1 and str2 are identical");
    else if(i<0)    
        printf("\n\nstr1< str2");
    else
        printf("\n\nstr1< str2");
    getch();
    return 0;
}
========================

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