{"id":15349,"date":"2022-10-11T08:11:26","date_gmt":"2022-10-11T02:41:26","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-cant-add-numbers-using-the-void-method\/"},"modified":"2022-10-11T08:11:26","modified_gmt":"2022-10-11T02:41:26","slug":"solved-cant-add-numbers-using-the-void-method","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-cant-add-numbers-using-the-void-method\/","title":{"rendered":"[Solved] Can’t add numbers using the void method"},"content":{"rendered":"

[ad_1]
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To make IncreaseStudents<\/code> work the way you want, you need to change two things: You need to return<\/em> a value, meaning it can’t be void<\/code>. And you need change the way you turn textBox3.Text<\/code> into an integer. You don’t parse the whole expression, textBox3.Text + num<\/code>; num<\/code> is a number already. All you need (or want) to parse is textBox3.Text<\/code>, because it’s a string. And we’ll use a different way of parsing, so that if the text doesn’t represent a number, it will fail politely instead of throwing an exception. <\/p>\n

public int IncreaseStudents(int num)\n{\n    int n;\n    if (int.TryParse(textBox3.Text, out n))\n    {\n         return n + num;\n    }\n    else\n    {\n         MessageBox.Show(\"Not a number: \" + textBox3.Text);\n         return num;\n    }\n}\n<\/code><\/pre>\n
Then this line of code should work fine — unless s1._stdNumber<\/code> is something weird that you can’t add to. <\/p>\n
listBox1.Items.Add(s1._stdNumber + IncreaseStudents(25));\n<\/code><\/pre>\n
But that’s not the assignment. The assignment says you have to use void. So, another try: <\/p>\n
public void IncreaseStudents(int num, out int result)\n{\n    int n;\n    if (int.TryParse(textBox3.Text, out n))\n    {\n         result = n + num;\n    }\n    else\n    {\n         MessageBox.Show(\"Not a number: \" + textBox3.Text);\n         result = num;\n    }\n}\n<\/code><\/pre>\n
And call like this:<\/p>\n
int result = 0;\nIncreaseStudents(25, out result)\n\nlistBox1.Items.Add(s1._stdNumber + result);\n<\/code><\/pre>\n
Silly, but if your instructor wants that, that’s what he wants. <\/p>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            10<\/span> <\/p><\/div>\n<\/div>\n
[ad_2]<\/p>\n
solved Can’t add numbers using the void method <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] To make IncreaseStudents work the way you want, you need to change two things: You need to return a value, meaning it can’t be void. And you need change the way you turn textBox3.Text into an integer. You don’t parse the whole expression, textBox3.Text + num; num is a number already. All you need … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324],"class_list":["post-15349","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c"],"yoast_head":"\n[Solved] Can't add numbers using the void method - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-cant-add-numbers-using-the-void-method\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Can't add numbers using the void method - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] To make IncreaseStudents work the way you want, you need to change two things: You need to return a value, meaning it can’t be void. 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