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ClassworkLab4.c

+#include <stdio.h>
+#include <stdlib.h> /* this library contains the rand() function */
+#include <string.h>
+
+
+int main(){
+	
+//Nested loops	
+	for(int i = 0; i < 3; i++){
+		printf("%d\n", i);
+		//perform the following FOR EACH loop
+		for(int j = 0; j < 9; j++){
+			//perform the following FOR EACH loop
+			printf(">>%d\n", j);
+		}
+	}	
+	printf("\n");	
+	
+//2D arrays
+	int array[3][5] = { //this is a way to fill an array at creation
+		{4, 2, 4, 2, -1}, //this fills a single row
+		{-3, 55, 1, 223, 2}, //notice a comma between each row
+		{2, 4, 5, 2, 1} //and notice that this block is indented: STYLE
+	}; //and a closing curly-brace to match the opöening brace at line 5
+		
+	/* this nested loop pair reads the matrix */	
+	
+	for(int i = 0; i < 3; i++){ /*i tracks with row we're on */
+		for(int j = 0; j < 5; j++){ /* j tracks wich column we're on */
+				
+			printf("%d, ", array[i][j]);
+				
+		}
+		printf("\n");
+		/* i increments to the next row onlz after we have read ALL colums */
+	}		
+	printf("\n");
+	
+//2D arrays with random function	
+	for(int i = 0; i < 3; i++){ 
+		for(int j = 0; j < 5; j++){
+			
+			array[i][j] = rand() % 500 ;
+		}
+	}	
+	for(int i = 0; i < 3; i++){ 
+		for(int j = 0; j < 5; j++){
+			
+			/* this generates a random number 0-499 */				
+			printf("%d, ", array[i][j]);
+				
+		}
+		printf("\n");
+	}		
+	printf("\n");
+	
+// string
+	char array2[40] = "this is a string";	
+	//int breakPoint;
+	printf("|");
+	for(int i =0; i < 40; i++){
+		
+		printf("%c", array2[i]);
+		
+	}
+	printf("|\n|");
+	printf("%s", array2);
+	printf("|");
+	
+	printf("\n\n");
+	
+// string with string.h library
+	char string1[40] = "this is a string";
+	
+	char string2[] = "so is this";
+	
+	int length = strlen(string1);
+	printf("%d", length);
+	printf("\n");
+	
+	strcat(string1, " ");
+	strcat(string1, string2);
+	printf("%s", string1);	
+	
+	return 0;
+}