Lab 5 tasks

Lab 4/bonus_task.c

@@ -14,7 +14,7 @@ int main() {
     char **list;
     list = malloc(totalSize * sizeof(char*));
 
-    char * name;
+    char *name;
     name = malloc(size * sizeof(char));
     printf("Please input %d names:\n", total);
 

Lab 4/task_2.c

@@ -11,19 +11,20 @@ int main() {
     printf("Please enter matrix dimension: ");
     scanf("%d", &x);
     y = x;
-    
+
     int choice;
     printf("What do you want to do?\n1: add\n2: subtract\n3: Sum of multiplication of diagonal\n");
     scanf("%d", &choice);
-    
+
+
     int totalSize = x * y;
-    
+
     printf("Input first matrix:\n");
     int *matrix1 = inputMatrices(x, y, totalSize);
-    
+
     printf("Input second matrix:\n");
     int *matrix2 = inputMatrices(x,y, totalSize);
-    
+
     switch(choice) {
         case 1:
             addMatrices(matrix1, matrix2, totalSize, x);
@@ -38,8 +39,8 @@ int main() {
             printf("Invalid option!");
             break;
     }
-    
-    
+
+
     free(matrix1);
     free(matrix2);
     return (EXIT_SUCCESS);
@@ -53,7 +54,7 @@ void addMatrices(int matrix1[], int matrix2[], int totalSize, int x) {
         } else {
             printf(" ");
         }
-    } 
+    }
 }
 
 void subtractMatrices(int matrix1[], int matrix2[], int totalSize, int x) {
@@ -64,11 +65,11 @@ void subtractMatrices(int matrix1[], int matrix2[], int totalSize, int x) {
         } else {
             printf(" ");
         }
-    } 
+    }
 }
 
 void sumDiagonalMatrices(int matrix1[], int matrix2[], int totalSize, int x) {
-    int mul1 = 1, mul2 = 1;
+    int mul1 = 1, mul2 = 1, mul1x;
     for (int i = 0; i < totalSize; i += (x + 1)) {
         mul1 *= matrix1[i];
         mul2 *= matrix2[i];
@@ -85,5 +86,3 @@ int * inputMatrices(int x, int y, int totalSize) {
     }
     return matrix;
 }
-
-

Lab 5/bonus_task.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+char names[5][20] = {
+    "Bob",
+    "Michael",
+    "max",
+    "Mjchael",
+    "andrei"
+};
+
+int main() {
+    int length = 5;
+    int isSorted = 0;
+
+    while(!isSorted) {
+        isSorted = 1;
+        length--;
+        for (int i = 0; i < length; i++) {
+            char name1[20], name2[20];
+            strlcpy(name1, names[i], sizeof(names[i]));
+            strlcpy(name2, names[i + 1], sizeof(names[i + 1]));
+            // Too lazy to compare 1st 5 char, so i compared all
+            if (strcmp(strlwr(name1), strlwr(name2)) > 0) {
+                isSorted = 0;
+                char buff[20];
+                strlcpy(buff, names[i], sizeof(names[i]));
+                strlcpy(names[i], names[i + 1], sizeof(names[i + 1]));
+                strlcpy(names[i + 1], buff, sizeof(buff));
+            }
+        }
+    }
+    for (int i = 0; i < 5; i++) {
+        printf("%s\n", names[i]);
+    }
+
+    return (EXIT_SUCCESS);
+}

Lab 5/task1.c

+#include <stdio.h>
+#include <stdlib.h>
+
+void task1Function(void) {
+    int N, i, j;
+    scanf("%d", &N);
+    int array[N];
+    
+    for (i = 0; i < N; i++) {
+        scanf("%d", &array[i]);
+    }
+    
+    for (i = 0; i < N; i++) {
+        for (j = 0; j < N - 1; j++) {
+            if (array[j] < array[j + 1]) {
+                int swap = array[j];
+                array[j] = array[j + 1];
+                array[j + 1] = swap;
+            }
+        }
+    }
+}
+

Lab 5/task2.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int square(int input) {
+    int out = input * input;
+    return out;
+}
+
+float getAngle(int vec1[], int vec2[]) {
+    float mag1 = (float)(sqrt(square(vec1[0]) + square(vec1[1]) + square(vec1[2])));
+    float mag2 = (float)(sqrt(square(vec2[0]) + square(vec2[1]) + square(vec2[2])));
+    int dotProd = vec1[0] * vec2[0] + vec1[1] * vec2[1] + vec1[2] * vec2[2];
+    float cos = (float)(dotProd / (mag1 * mag2));
+    
+    return (float)acos(cos) * 180 / M_PI;
+}
+
+void printVector(int vec[], char buffer[]) {
+    snprintf(buffer, 20 * sizeof(char), "( %d, %d, %d )", vec[0], vec[1], vec[2]);
+}
+
+int main1() {
+    int vec[4][3] = {
+        {1, 4, 6},
+        {2, -3, 1},
+        {3, 5, 0},
+        {3, 1, -3}
+    };
+    int start = 1;
+    for (int i = 0; i < 4; i++) {
+        for (int j = start; j < 4; j++) {
+            char buffer1[20];
+            char buffer2[20];
+            printVector(vec[i], buffer1);
+            printVector(vec[j], buffer2);
+            
+            printf("%s and %s:\t", buffer1, buffer2);
+            printf("%f degree\n",getAngle(vec[i], vec[j]));
+        }
+        start++;
+    }
+    
+    return (EXIT_SUCCESS);
+}
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Lab 5/task3.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+char emails[9][30] = {
+    "omeguy@rusty.edu",
+    "milfHunter@gmail.com",
+    "smarmy@yahoo.com",
+    "h8sgmail.com@yahoo.com",
+    "smokinRocks@gmail.com",
+    "whodoesthis?@hotmail.com",
+    "smallPerson@hotmail.com",
+    "WhereIntheW0rld@WIW.com",
+    "mom_has_a_computer@aol.com"
+};
+
+int main2() {
+    int isGmail = 0;
+    for (int i = 0; i < 8; i++) {
+        int size = sizeof(emails[i]) / sizeof(char);
+        char email[size];
+        strcpy(email, emails[i]);
+        
+        char buffer[size];
+        int isAt = 0;
+        for (int j = 0; j < size; j++) {
+            if (email[j] == '@') {
+                isAt = 1;
+                if(email[j + 1] == 'g') isGmail++;
+            }
+            if (!isAt) buffer[j] = email[j];
+        }
+        buffer[size] = '\0';
+        printf("%s\n", buffer);
+    }
+    printf("Number of gmails: %d\n", isGmail);
+    return (EXIT_SUCCESS);
+}
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