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module 11_stringOperation/a_copyString.c

@@ -0,0 +1,15 @@
+// Copy from ONE string to ANOTHER STRING
+//
+#include<stdio.h>
+#include<string.h>
+int main(){
+    char a[100], b[100];
+    scanf("%s %s",&a,&b);  // space will not accept in any string
+    // for(int i=0; i<=strlen(b); i++){
+    //     a[i] = b[i] ;  // COPY from STRING-b to STRING-a  // NULL CHARACTER also copied 
+    // }
+
+    strcpy(a,b);  // SAME WORK WITH FUNCTION
+    printf("%s %s\n",a,b) ;
+    return 0 ;
+}

module 11_stringOperation/b_Lex__strcmp_.c

@@ -0,0 +1,19 @@
+// Lexicographically compare WITH "strcmp()" FUNCTION
+
+
+#include<stdio.h>
+#include<string.h>
+
+int main(){
+    char a[100], b[100];
+    scanf("%s %s",a,b);
+
+    int ans = strcmp(a,b);
+
+    if(ans<0) printf("A is SMALLER");  // most of time ans=-1
+    else if(ans==0) printf("SAME STRING");
+    else if(ans>0) printf("B is SMALLER"); // most of time ans=1
+
+
+    return 0 ;
+}

module 11_stringOperation/b_Lexicographically_compare.c

@@ -0,0 +1,33 @@
+// Lexicographically compare
+
+#include<stdio.h>
+#include<string.h>
+int main(){
+    char a[100], b[100];
+    scanf("%s %s",a,b);
+    int i=0 ;
+    while(1){
+        if(a[i]=='\0' && b[i]=='\0'){        // FOR NULL CHECK
+            printf("SAME STRING\n"); break ;
+        }
+        else if(a[i]=='\0') {
+            printf("A is smaller\n"); break; 
+        }
+        else if(b[i]=='\0'){
+            printf("B is smaller\n"); break ; 
+        }
+
+        if(a[i]== b[i]){                  // FOR LETTER CHECK
+             i++ ;
+        }
+        else if(a[i]>b[i]){ 
+            printf("B is smaller\n"); break ;
+        }
+        else {
+            printf("A is smaller\n"); break ; 
+        }
+
+
+    }
+    return 0 ;
+}

module 11_stringOperation/c_string_concat_3.c

@@ -0,0 +1,20 @@
+ // STRING CONCATENATION only 3 character // a= apple , b= orange
+
+ // after concat, a= appleora
+
+#include<stdio.h>
+#include <string.h>
+
+int main(){
+    char a[200], b[100];
+    scanf("%s %s",&a,&b);
+
+    int k= strlen(a);
+    for(int i=0; i<=2; i++){
+        a[k] = b[i];
+        k++ ; 
+    }
+    a[k]= '\0';
+    printf("%s %s", a,b);
+    return 0 ;
+}

module 11_stringOperation/c_string_concat_FUNC.c

@@ -0,0 +1,14 @@
+ // STRING CONCATENATION // a= apple , b= orange
+ // after concat, a= appleorange
+
+#include<stdio.h>
+#include <string.h>
+
+int main(){
+    char a[200], b[100];
+    scanf("%s %s",&a,&b);
+    strcat(a,b);
+
+    printf("%s %s", a,b);
+    return 0 ;
+}

module 11_stringOperation/c_string_concatenation.c

@@ -0,0 +1,19 @@
+ // STRING CONCATENATION // a= apple , b= orange
+ // after concat, a= appleorange
+
+#include<stdio.h>
+#include <string.h>
+
+int main(){
+    char a[200], b[100];
+    scanf("%s %s",&a,&b);
+
+    int k= strlen(a);
+    for(int i=0; i<=strlen(b); i++){
+        a[k] = b[i];
+        k++ ; 
+    }
+
+    printf("%s %s", a,b);
+    return 0 ;
+}

module 11_stringOperation/d_Counting_array.c

@@ -0,0 +1,26 @@
+// COUNTING ARRAY / FREQUENCY ARRAY // ** INTEGER
+// count value 0 to 6 from an ARRAY
+// MAIN ARRAY's values start from 0, end with 6.
+
+#include<stdio.h>
+
+int main(){
+    int n;
+    scanf("%d",&n);
+    int ar[n];
+    for(int i=0; i<n; i++){
+        scanf("%d",&ar[i]);
+    }
+
+    int cnt[7]={0} ;
+    for(int i=0; i<n; i++){
+       int val= ar[i];
+       cnt[val]= cnt[val]+1 ; // cnt[val]++
+    }
+
+    for(int i=0; i<7; i++){
+        printf(" %d = %d times\n",i, cnt[i]);
+    }
+
+    return 0 ;
+}

module 11_stringOperation/e_Cunting_Array_Char.c

@@ -0,0 +1,25 @@
+// COUNTING ARRAY / FREQUENCY ARRAY
+// count character 'a' to 'z' from an ARRAY
+// MAIN ARRAY's values start from 0, end with 27.
+ //*** ALPHABETICALLY PRINT
+
+#include<stdio.h>
+#include<string.h>
+
+int main(){
+    char ar[100];
+    scanf("%s",&ar);
+
+    int cnt[26]={0} ;
+    for(int i=0; i<strlen(ar); i++){
+       int val= ar[i]-'a' ;
+       cnt[val]= cnt[val]+1 ; // cnt[val]++
+    }
+
+    for(int i=0; i<26; i++){
+        if(cnt[i] != 0)         // ALPHABETICALLY PRINT
+            printf("%c = %d times\n",i+'a', cnt[i]);
+    }
+
+    return 0 ;
+}

module 11_stringOperation/e_Cunting_Array_Char01.c

@@ -0,0 +1,27 @@
+// COUNTING ARRAY / FREQUENCY ARRAY
+// count character 'a' to 'z' from an ARRAY
+// MAIN ARRAY's values start from 0, end with 27.
+//** string CHARECTER WISE PRINT
+
+#include<stdio.h>
+#include<string.h>
+
+int main(){
+    char ar[100];
+    scanf("%s",&ar);
+
+    int cnt[26]={0} ;
+    for(int i=0; i<strlen(ar); i++){
+       int val= ar[i]-'a' ;
+       cnt[val]= cnt[val]+1 ; // cnt[val]++
+    }
+
+    for(int i=0; i<strlen(ar); i++){      //string CHARECTER WISE PRINT
+        int val = ar[i] - 'a' ;
+        if(cnt[val] != 0)
+            printf("%c = %d times\n",ar[i], cnt[val]);
+        cnt[val]= 0 ;
+    }
+
+    return 0 ;
+}