{"id":18010,"date":"2022-10-28T15:42:06","date_gmt":"2022-10-28T10:12:06","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-why-cant-i-check-the-return-of-a-function-with-a-switch\/"},"modified":"2022-10-28T15:42:06","modified_gmt":"2022-10-28T10:12:06","slug":"solved-why-cant-i-check-the-return-of-a-function-with-a-switch","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-why-cant-i-check-the-return-of-a-function-with-a-switch\/","title":{"rendered":"[Solved] Why can’t i check the return of a function with a switch?"},"content":{"rendered":"

[ad_1]
\n<\/p>\n

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It can be done – however your function should be returning an int.<\/p>\n

int foo(void) { return 1; }\n\nint main(void)\n{\n    switch(foo()) {\n    case 0:  \n            printf(\"foo\\n\");\n            break;\n    case 1:  \n            printf(\"bar\\n\");\n            break;\n    default:\n            break;\n    }   \n    return 0;\n}\n<\/code><\/pre>\n
As, can been seen this compiles and runs.<\/p>\n
[09:36 PM] $ gcc -Wall -Werror switcht.c -o switcht\n[09:36 PM] $ .\/switcht \nbar\n[09:36 PM] $\n<\/code><\/pre>\n
However, if your function returns anything other than int then it wont compile. For instance if foo()<\/code> return float<\/code>:<\/p>\n
float foo(void) { return 1.0; }\n<\/code><\/pre>\n
Then:<\/p>\n
[09:44 PM] $ gcc -Wall -Werror switcht.c \nswitcht.c: In function \u2018main\u2019:\nswitcht.c:7:9: error: switch quantity not an integer\nswitch(foo()) {\n     ^~~~~~\n[09:44 PM] $\n<\/code><\/pre>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            2<\/span> <\/p><\/div>\n<\/div>\n
[ad_2]<\/p>\n
solved Why can’t i check the return of a function with a switch? <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] It can be done – however your function should be returning an int. int foo(void) { return 1; } int main(void) { switch(foo()) { case 0: printf(“foo\\n”); break; case 1: printf(“bar\\n”); break; default: break; } return 0; } As, can been seen this compiles and runs. [09:36 PM] $ gcc -Wall -Werror switcht.c -o … 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":[324,639,1818,893],"class_list":["post-18010","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-if-statement","tag-return","tag-switch-statement"],"yoast_head":"\n[Solved] Why can't i check the return of a function with a switch? - 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-why-cant-i-check-the-return-of-a-function-with-a-switch\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Why can't i check the return of a function with a switch? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] It can be done – however your function should be returning an int. int foo(void) { return 1; } int main(void) { switch(foo()) { case 0: printf("foon"); break; case 1: printf("barn"); break; default: break; } return 0; } As, can been seen this compiles and runs. [09:36 PM] $ gcc -Wall -Werror switcht.c -o ... 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