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Here is a main()<\/code> that calls base64_encode()<\/code>:<\/p>\nint main(void) {\n char data[] = \"test\";\n char *encoded_data;\n size_t len;\n\n encoded_data = base64_encode(data, strlen(data), &len);\n printf(\"%s (%zu) => %s (%zu)\", data, strlen(data), encoded_data, len);\n}\n<\/code><\/pre>\nExplanation<\/h3>\n
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char data[]<\/code><\/strong> contains your string to encode. You’ll need to pass it as an argument to base64_encode()<\/code>.<\/li>\nchar *encoded_data<\/code><\/strong> is a pointer that you’ll use to store the return value of base64_encode()<\/code>. You will use this variable to access the decoded string, since base64_encode()<\/code> returns a pointer to an allocated space where the decoded string is stored.<\/li>\nsize_t len<\/code><\/strong> is a variable that will be used to store the size of the decoded string. You’ll give a pointer to this variable as argument to base64_encode()<\/code>.<\/li>\nstrlen(data)<\/code><\/strong>, the second argument to base64_encode()<\/code>, is the length of char data[]<\/code>.<\/li>\n<\/ul>\n<\/div>\n